FCC ID: PX8RH45V2F-B Public Safety UHF DAS Remote Unit

CriticalPoint UHF Public Safety DAS DISTRIBUTED ANTENNA SYSTEM USER MANUAL Public Safety UHF DAS System QE: 1-0-0 Comba Telecom Network Systems Limited The information contained herein is the responsibility of and is approved by the following, to whom all enquiries should be directed:

This is an unpublished work the copyright in which vests in Comba Telecom Network Systems Limited ("Comba"). All rights reserved. The information contained herein is confidential and the property of Comba and is supplied without liability for errors or omissions. No part may be reproduced, disclosed or used except as authorized by contract or other written permission. The copyright and the foregoing restriction on reproduction and use extend to all media in which the information may be embodied. INSTALLATION GUIDE FOR UHF DAS 0.1 CONTENTS Section Page CONTENTS ........................................................................................................................................ 3 INDEX TO FIGURES AND TABLES ............................................................................................... 5 HISTORY ........................................................................................................................................... 6 GLOSSARY OF TERMS ................................................................................................................... 7 SAFETY NOTICES AND ADMONISHMENTS .............................................................................. 8 GENERAL INFORMATION ........................................................................................................... 10 EQUIPMENT DESCRIPTION ......................................................................................................... 12 SYSTEM DIAGRAM ....................................................................................................................... 12 EQUIPMENT CONSTITUTION ..................................................................................................... 13 EQUIPMENT CONNECTORS ........................................................................................................ 13 UHF PS DAS CONNECTORS ......................................................................................................... 13 TYPICLA APPLICATION ............................................................................................................... 16 APPLICATION 1: ONE MU CONNECTS 32 RUS. ..................................................................... 16 APPLICATION 2: 2 MU (MAIN MU AND BACKUP MU) CONNECT 32 RUS. ....................... 17 APPLICATION 3: 2MU (MAIN MU AND BACKUP MU) CONNECT 16RUS WITH OPTICAL FIBER BACKUP. ............................................................................................................................ 17 SPECIFICATION OF UHF DAS SYSTEM ..................................................................................... 18 INSTALLATION .............................................................................................................................. 20 WARNINGS AND ALERTS............................................................................................................ 20 SITE PLANNING CONSIDERATIONS ......................................................................................... 21 SITE PLANNING ............................................................................................................................. 21 INSTALLATION CHECKLIST ....................................................................................................... 22 INSTALLATION PROCEDURES ................................................................................................... 23 GOODS INWARDS INSPECTION ................................................................................................. 23 TOOLS .............................................................................................................................................. 23 PREPARATION ............................................................................................................................... 23 WALL MOUNTING FOR MU AND RU ........................................................................................ 23 DRIP-LOOP ...................................................................................................................................... 24 CABINET MOUNTING FOR EU .................................................................................................... 24 WALL MOUNTING FOR EU ......................................................................................................... 26 GROUNDING .................................................................................................................................. 29 DC POWER CONNECTION FOR MU AND RU ........................................................................... 29 DC POWER AND MONITOR CABLE CONNECTION BETWEEN MU AND EU ..................... 30 DC POWER AND MONITOR CABLE CONNECTION BETWEEN EU AND EU ...................... 31 RF CABLE CONNECTION ............................................................................................................. 31 WEB ACCESS .................................................................................................................................. 31 DRY CONTACT CABLE ................................................................................................................ 31 WEB GUI .......................................................................................................................................... 34 WEB GUI CONNECTION ............................................................................................................... 34 WEB GUI INTRODUCTION ........................................................................................................... 35 COMMISSIONING .......................................................................................................................... 37 PRE-COMMISSIONING TASKS .................................................................................................... 37 COMMISSIONING PROCEDURE ................................................................................................. 37 ENU STATUS : 1-0-0 Copyright - refer to title page Page 3 0.1 0.2 0.3 0.4 0.5 1 2 2.1 2.3 2.4 2.4.1 2.5 2.5.1 2.5.2 2.5.3 2.6 3 3.1 3.2 3.2.1 3.2.2 3.3 3.3.1 3.3.2 3.3.3 3.3.4 3.3.5 3.3.6 3.3.7 3.3.8 3.3.9 3.3.10 3.3.11 3.3.12 3.3.13 3.3.14 4 4.1 4.2 5 5.1 5.2 6 7 7.1 7.2 7.3 INSTALLATION GUIDE FOR UHF DAS MAINTENANCE ............................................................................................................................. 38 APPENDICES .................................................................................................................................. 39 APPENDIX A: TOOLS .................................................................................................................... 39 APPENDIX B: DECLARATION OF HARMFUL SUBSTANCES AND CONTENT ................... 40 APPENDIX D: RMA (RETURN MATERIAL AUTHORIZATION) ............................................. 41 ENU STATUS : 1-0-0 Copyright - refer to title page Page 4 INSTALLATION GUIDE FOR UHF DAS 0.2 INDEX TO FIGURES AND TABLES Figure 1: Master Unit (MU) ............................................................................................................................................. 10 Figure 2: Expansion Unit (EU) ......................................................................................................................................... 11 Figure 3: Remote Unit (RU) ............................................................................................................................................. 11 Figure 4: UHF PS DAS Functional Block Diagram .......................................................................................................... 12 Figure 5: MU Equipment Connectors ................................................................................................................................ 13 Figure 6: EU Equipment Connectors ................................................................................................................................. 14 Figure 7: RU Equipment Connectors................................................................................................................................. 15 Figure 8: Application 1 System Diagram .......................................................................................................................... 16 Figure 9: Application 2 System Diagram .......................................................................................................................... 17 Figure 10: Application 3 System Diagram ........................................................................................................................ 17 Figure 11: Mounting Rack Overview ................................................................................................................................ 23 Figure 12: UHF PS DAS (MU and RU) Wall Mounting ................................................................................................... 24 Figure 13: Dimension of Expansion Unit for Cabinet Mounting ...................................................................................... 25 Figure 14: Expansion Unit Cabinet Mounting ................................................................................................................... 26 Figure 15: Expansion Unit Wall Mounting ....................................................................................................................... 26 Figure 16: The mounting hangers of Expansion Unit ........................................................................................................ 27 Figure 17: Hole punching diagram for Wall-mounted installation .................................................................................... 27 Figure 18: Expansion Unit Wall Mounting ....................................................................................................................... 28 Figure 19: DC power connection for MU and RU ............................................................................................................ 29 Figure 20: DC power and Monitor cable connection ......................................................................................................... 30 Figure 21: DC power and Monitor cable connection for EU ............................................................................................. 31 Figure 22: Input IP Address ............................................................................................................................................... 34 Figure 23: Input User Name and Password ....................................................................................................................... 34 Figure 24: Web GUI Main Screen ..................................................................................................................................... 35 Figure 25: Dashboard Screen ............................................................................................................................................. 35 Figure 26: Chanel Frequency Info ..................................................................................................................................... 36 Figure 27: Sub Band Info .................................................................................................................................................. 36 Table 1: MU Equipment Connectors ................................................................................................................................. 13 Table 2: EU Equipment Connectors .................................................................................................................................. 14 Table 3: RU Equipment Connectors .................................................................................................................................. 15 Table 4: Pin Definition of Dry Contact Cable ................................................................................................................... 31 Table 5: Commissioning Task Explanation ....................................................................................................................... 37 ENU STATUS : 1-0-0 Copyright - refer to title page Page 5 INSTALLATION GUIDE FOR UHF DAS 0.3 HISTORY Change No. 1 ENU 1-0-0 Details Of Change This manual first created and issued in Dec. 2021. ENU STATUS : 1-0-0 Copyright - refer to title page Page 6 INSTALLATION GUIDE FOR UHF DAS 0.4 GLOSSARY OF TERMS Abbreviation Definition ALC ATT BTS CH CSA dB dBm DL DT DPX FOU FS Hz ID IF LNA LOS MCU MHz MT MTBF MU NF OMC OMT OP PA PLL PSU RF RFU RU SMA TX/RX UL VAC VDC VSWR Automatic Level Control Attenuator Base Transceiver Station Channel Cross Sectional Area Decibel Decibels relative to 1 milliwatt Downlink Donor Terminal Duplexer Fiber Optical Unit Frequency Selection Hertz Identification Intermediate Frequency Low Noise Amplifier Line-of-Sight Main Control Unit Megahertz Mobile Terminal Mean Time Between Failures Master Unit Noise Figure Operation & Maintenance Center Operation & Maintenance Terminal Optical Fiber Power Amplifier Phase Locked Loop Power Supply Unit Radio Frequency Radio Frequency Unit Remote Unit Sub-Miniature A Connector Transmit/Receive Uplink Volts Alternating Current Volts Direct Current Voltage Standing Wave Ratio ENU STATUS : 1-0-0 Copyright - refer to title page Page 7 INSTALLATION GUIDE FOR UHF DAS 0.5 SAFETY NOTICES AND ADMONISHMENTS This document contains safety notices in accordance with appropriate standards. In the interests of conformity with the territory standards for the country concerned, the equivalent territorial admonishments are also shown. Any installation, adjustment, maintenance and repair of the equipment must only be carried out by trained, authorized personnel. At all times, personnel must comply with any safety notices and instructions. Specific hazards are indicated by symbol labels on or near the affected parts of the equipment. The labels conform to international standards, are triangular, and are colored black on a yellow background. An informative text label may accompany the symbol label. Hazard labeling is supplemented by safety notices in the appropriate equipment manual. These notices contain additional information on the nature of the hazard and may also specify precautions. Note: The grantee is not responsible for any changes or modifications not expressly approved by the party responsible for compliance. Such modifications could void the users authority to operate the equipment. For compliance with the general population RF exposure limits, each individual antenna used for this transmitter must be installed to provide a separation distance greater than 116.00cm or more from all persons during normal operation and must not be co-located with any other antenna for meeting RF exposure requirements. Warning Notices:

These draw the attention of personnel to hazards that may cause death or injury to the operator or others. Examples of use are cases of high voltage, laser emission, toxic substances, point of high temperature, etc. The design of the antenna installation needs to be implemented in such a way so as to ensure RF radiation safety levels and non-environmental pollution during operation. Note: Antennas, feeders and couplers are not included in the packing list; solution provider should consider these accessories according to site conditions. MU and RU FCC Warning Notices:

WARNING. This is NOT a CONSUMER device. It is designed for installation by FCC LICENSEES and QUALIFIED INSTALLERS. You MUST have an FCC LICENSE or express consent of an FCC Licensee to operate this device. You MUST register Class B signal boosters (as defined in 47 CFR 90.219) online at www.fcc.gov/signal-boosters/registration. Unauthorized use may result in significant forfeiture penalties, including penalties in excess of $100,000 for each continuing violation. EU Warning Notices:

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

(1) this device may not cause harmful interference, and

(2)this device must accept any interference received, including interference that may cause undesired operation. Note: The grantee is not responsible for any changes or modifications not expressly approved by the party responsible for compliance. Such modifications could void the users authority to operate the equipment. Alert:

These draw the attention of personnel to hazards that may cause damage to the equipment. An example of use is the case of static electricity hazard. Caution notices may also be used in the handbook to draw attention to matters that do not constitute a risk of causing ENU STATUS : 1-0-0 Copyright - refer to title page Page 8 INSTALLATION GUIDE FOR UHF DAS damage to the equipment but where there is a possibility of seriously impairing its performance, e.g. by mishandling or gross maladjustment. Warnings and Cautions within the main text do not incorporate labels and may be in shortened form. Disconnection of the RU RF connectors may cause damage to the equipment when power is on. The application antenna and RF cable are not provided. The antenna gain should not exceed 0 dBi. WARNING!

Use only authorized and approved antennas, cables and/or coupling devices! The use of unapproved antennas, cables or coupling devices could cause damage and may be of violation of FCC regulations. The use of unapproved antennas, cables and/or coupling devices is illegal under FCC regulations and may subject the user to fines. Information of Class A or B device as below:

PUBLIC SAFETY UHF DAS MASTER UNIT (MU):

CLASS A:

AC: RX45V2F-A-AC DC: RX45V2F-A-48 CLASS B:

AC: RX45V2F-B-AC DC: RX45V2F-B-48 PUBLIC SAFETY UHF DAS REMOTE UNIT (RU):

CLASS A:

AC: RH45V2F-A-AC DC: RH45V2F-A-48 CLASS B:

AC: RH45V2F-B-AC DC: RH45V2F-B-48 End of Section ENU STATUS : 1-0-0 Copyright - refer to title page Page 9 INSTALLATION GUIDE FOR UHF DAS 1 GENERAL INFORMATION The Public Safety UHF Distributed Antenna System (hereinafter called UHF PS DAS) consists of the Master Unit

(MU), the Expansion Unit (EU) and Remote Unit (RU). The MU includes the MU Chassis, Power Supply Unit (PSU), and RF module. The Expansion Unit includes the optical modules. The Fiber Optical module is a modular design, and can support up to 4 or 8 independent Remote Units. The Remote Unit is designed with a compact form for easy installation. The low signal transmission loss of optical fiber is applicable for long distance transmission. UHF PS DAS can support optical transmission with up to 6.5dBo of optical loss, equivalent to 8 miles of fiber length. Main Features Supports P25 P1/P2, digital and conventional analog communications simultaneously Simplex and internal Duplexing supported Up to 32 narrow band filters (Class A) Up to 4 wide band filters (Class B) Supports up to 32 Remote Units when cascading Expansion Unit Supports MU/EU/Fiber Redundancy Channelized and per time slot Auto Level Control (ALC) supported (Class A) Channelized uplink squelch supported (Class A) Built-in mandatory isolation test to prevent oscillation Auto shutdown with alarm upon oscillation detection Web based GUI for intelligent configuration, SNMP supported NFPA 1221 / IFC compliant dry contact alarms UL50E Type 4 / NEMA 4 enclosure on MU/RU/EU The following figure shows the enclosure of the UHF PS DAS Master Unit(MU), Expansion Unit(EU) and Remote Unit(RU). Figure 1: Master Unit (MU) ENU STATUS : 1-0-0 Copyright - refer to title page Page 10 INSTALLATION GUIDE FOR UHF DAS Figure 2: Expansion Unit (EU) Figure 3: Remote Unit (RU) End of Section ENU STATUS : 1-0-0 Copyright - refer to title page Page 11 INSTALLATION GUIDE FOR UHF DAS 2 EQUIPMENT DESCRIPTION 2.1 SYSTEM DIAGRAM Remark: Battery Backup Unit shown as above figure is only used as a reserved port Figure 4: UHF PS DAS Functional Block Diagram In the downlink path, the BTS signals are received by the donor antenna that is connected to the Master Unit. After the duplexer, the signals are sent to the LNA module for pre-amplification and to the digital RF integrated module for digital filtering and frequency conversion. Then the DL signals will be filtered via the duplexer, and then sent to the Expansion Unit(s), the RF signal is converted into an optical signal and then distributed to the Remote Unit(s) to over optical fiber. After amplification by the RU, the signals are transmitted at the MT port to the service antenna infrastructure. In the uplink path, the mobile signals are received by the service antenna. After passing through the MT port duplexer, the signals are sent to the LNA and the integrated module for digital filtering, then the UL signals will be sent to the Expansion Unit(s), the RF signal is converted into an optical signal and then distributed to the Master Unit for filtering by the duplexer and power amplification. Finally, the uplink signals are sent to the donor antenna for transmission back to the BTS. ENU STATUS : 1-0-0 Copyright - refer to title page Page 12 INSTALLATION GUIDE FOR UHF DAS 2.3 EQUIPMENT CONSTITUTION The typical UHF PS DAS unit consists of the following components:

Power Amplifier (PA): It provides power amplification for both the UL and DL branches. Main Control Unit (MCU): The MCU is used to monitor and control the operation of the repeater. It also provides the communication interface for remote control and status indication. LED indicators provide the operational status of the MCU. Duplexer: The DPX is located near the MT and DT terminals and permits the uplink and downlink signals to share a common antenna. Digital Integrated Module and Power Amplifier: Consists of the Power Conversion module, RF module, digital process module and monitoring modules. The Power Conversion module converts +28V DC voltage into +9VJK and +9VRF.

+9VJK, +9VRF are supplied to the monitoring unit, and the RF unit in the integrated module separately. The RF module amplifies and converts the RF signal to IF signal. The Digital process module converts the IF signal into baseband signal via AD conversion and extraction, and filtering. After that, the IF signal will be amplified and converted to an RF signal by the RF module for RF filtering and amplification. The Monitoring module monitors and controls the system parameters and is the interface for both remote monitoring and local commissioning. Power Supply Unit (PSU): The PSU converts the input voltage into a stable DC supply to provide power for the internal functional modules. Optical module: Completes optical signal and RF signal conversion. 2.4 EQUIPMENT CONNECTORS 2.4.1 UHF PS DAS CONNECTORS The PS DAS is designed for all cable entries to be routed from the right or left of the enclosure, as shown in the following figure. Figure 5: MU Equipment Connectors Table 1: MU Equipment Connectors ENU STATUS : 1-0-0 Copyright - refer to title page Page 13 INSTALLATION GUIDE FOR UHF DAS Identifier Descriptions Power cable connector for a pre-installed power cord for connection to DC

(e.g. DC -48V, Max, current is 8A). ALM1/ALM2 Connector for Dry contact or External alarm Used for Equipment extension wiring routing RJ45 Connector for remote connection RJ45 Connector for local WEB GUI connection. Power1 AUX LAN OMT PWR/RUN/FUNC/OP LED indictor PWR: ON: Power supply is normal; OFF: Power supply is abnormal. RUN: Regular Flashing: MU is working fine; OFF or Always ON: MU is not working properly FUNC: Reserved OP: ON: Expansion connected; OFF: no Expansion connected DT/DL IN N-Female connector for connection to the donor antenna. MT/DL OUT N-Female connector for connection to the service antenna. UL IN Input port for Uplink Signal UL OUT Output port for Uplink Signal IN1 OUT1 SMA-Female connector to UL port of Expansion Unit SMA-Female connector to DL port of Expansion Unit IN2-4/OUT2-4 SMA-Female, Reserved Ground terminal Figure 6: EU Equipment Connectors Table 2: EU Equipment Connectors 1 The voltage identification is a variant due to electricity system diversity of global regions. The power cable connector might be identified for AC 110V, AC 220V, AC 110V/220V, or DC -48V respectively. Please refer to specific product or contact local sales if any doubt. ENU STATUS : 1-0-0 Copyright - refer to title page Page 14 INSTALLATION GUIDE FOR UHF DAS Identifier Descriptions OP1/OP2 Optical ports Connect IN1 of MU (Master Unit) Connect OUT1 of MU (Master Unit) Connect IN1 of MU (Slave Unit), this port is only used when the backup function is used Connect OUT1 of MU (Slave Unit), this port is only used when the backup function is used Connect to UL1 of next EU for cascade connection Connect to DL1 of next EU for cascade connection Ground terminal Figure 7: RU Equipment Connectors Table 3: RU Equipment Connectors Identifier Descriptions Power1 Power cable connector for a pre-installed power cord for connection to DC

(e.g. DC -48V, Max, current is 8A). ALM1/ALM2 Connector for Dry contact or External alarm AUX Used for Equipment extension wiring routing 1 The voltage identification is a variant due to electricity system diversity of global regions. The power cable connector might be identified for AC 110V, AC 220V, AC 110V/220V, or DC -48V respectively. Please refer to specific product or contact local sales if any doubt. ENU STATUS : 1-0-0 Copyright - refer to title page Page 15 UL1 DL1 UL2 DL2 UL_E DL_E OMT OP INSTALLATION GUIDE FOR UHF DAS RJ45 Connector for local WEB GUI connection. Optical port, connect to Expansion Unit PWR/RUN/FUNC/OP LED indictor PWR: ON: Power supply is normal; OFF: Power supply is abnormal. RUN: Regular Flashing: RU is working fine; OFF or Always ON: RU is not working properly FUNC: Reserved OP: ON: Optical link is fine; OFF: Optical link is broken, optical TX or RX alarm MT/DL OUT N-Female connector for connection to the service antenna. UL IN Input port for Uplink Signal IN1-4/OUT1-4 Reserved Ground terminal 2.5 TYPICLA APPLICATION 2.5.1 APPLICATION 1: ONE MU CONNECTS 32 RUS. Figure 8: Application 1 System Diagram ENU STATUS : 1-0-0 Copyright - refer to title page Page 16 OP1OP2OP3OP4OP5OP6OP7OP8DL1UL1DL2UL2DL_EUL_EOP1OP2OP3OP4OP5OP6OP7OP8DL1UL1DL2UL2DL_EUL_EOP1OP2OP3OP4OP5OP6OP7OP8DL1UL1DL2UL2DL_EUL_EOP1OP2OP3OP4OP5OP6OP7OP8DL1UL1DL2UL2DL_EUL_ERU1EUMURU32RF CableFiber EU1EU2EU3EU4 INSTALLATION GUIDE FOR UHF DAS 2.5.2 APPLICATION 2: 2 MU (MAIN MU AND BACKUP MU) CONNECT 32 RUS. Figure 9: Application 2 System Diagram 2.5.3 APPLICATION 3: 2MU (MAIN MU AND BACKUP MU) CONNECT 16RUS WITH OPTICAL FIBER BACKUP. Figure 10: Application 3 System Diagram ENU STATUS : 1-0-0 Copyright - refer to title page Page 17 OP1OP2OP3OP4OP5OP6OP7OP8DL1UL1DL2UL2DL_EUL_EOP1OP2OP3OP4OP5OP6OP7OP8DL1UL1DL2UL2DL_EUL_EOP1OP2OP3OP4OP5OP6OP7OP8DL1UL1DL2UL2DL_EUL_EOP1OP2OP3OP4OP5OP6OP7OP8DL1UL1DL2UL2DL_EUL_ERU1EUMain MURU32RF CableFiber EU1EU2EU3EU4Backup MUOP1OP2OP3OP4OP5OP6OP7OP8DL1UL1DL2UL2DL_EUL_EOP1OP2OP3OP4OP5OP6OP7OP8DL1UL1DL2UL2DL_EUL_EOP1OP2OP3OP4OP5OP6OP7OP8DL1UL1DL2UL2DL_EUL_EOP1OP2OP3OP4OP5OP6OP7OP8DL1UL1DL2UL2DL_EUL_ERU1EUMain MURU16RF CableFiber EU1EU2EU3EU4Backup MUBackup FiberBackup Fiber Total Output Power, Uplink (MU Only) 27 (Typical TX/RX duplexed), 30 (TX/RX separate) Total Output Power, Downlink (MU and RU) 33 (Typical TX/RX duplexed), 36 (TX/RX separate) Uplink Downlink Uplink Downlink MHz nm Single Mode, WDM (single strand of fiber per Remote Units) INSTALLATION GUIDE FOR UHF DAS 2.6 SPECIFICATION OF UHF DAS SYSTEM EU Frequency Band Optical Wavelength Optical Connector Type Optical Fiber type VSWR Number of Remote Units supported per unit Electrical - System Frequency Range RF Passbands (RF windows) Maximum System Gain-Uplink without filters Maximum System Gain-Downlink without filters Gain Adjustment Range (1dB step) Pass Band Ripple, p-p Uplink Noise Figure Intermodulation Spurious Input VSWR Impedance Maximum RF Input Level without Damage Maximum RF Input Level without Overdrive Bandwidth: 6.25KHz Bandwidth: 12.5KHz Bandwidth: 25KHz Bandwidth: 75KHz Digital Filters - Class A Number of Filters Filter Bandwidth /

Out-of-Band Suppression /

System Group Delay Digital Filters - Class B Number of Filters Filter Bandwidth System Group Delay Out-of-Band Suppression MHz dBm dBm dB dB dB dB dB dBm dBm dBm sec

*Note:

A set of contiguous downlink/uplink channel pairs count as one passband (one window) Consult with a Comba technical representative for passband and window configurations before ordering 450-512MHz 450-512MHz 1310 1550 SC-APC 1.5 4 or 8 450 - 512 Up to 3

*See Note below MU: 0-30, RU: 0-30 FCC Compliance 102 105 3 7

-13 0

-10 1.5 50 32 60dBc @ filter center + 60KHz, 67us 60dBc @ filter center + 65KHz, 38us 50dBc @ filter center + 75KHz, 29us 60dBc @ filter center + 200KHz, 17us 200KHz 5MHz 4 8.5 45dBc @ filter edge + 0.6MHz 60dBc @ filter edge + 1MHz ENU STATUS : 1-0-0 Copyright - refer to title page Page 18 INSTALLATION GUIDE FOR UHF DAS in(mm) lb(kg) VDC VAC W oF(oC) in(mm) lb(kg) VDC VAC W oF(oC) in(mm) lb(kg) lb(kg) W W VDC oF (oC) 37.4x15.4x12.4 (950390315) 77 (35) without filter, 140 (63.5) with filter

-40 to -58 100-240/47-63Hz 85 N-Female 95%

-27 to +140 (-33 to +60) UL50E Type 4 / NEMA 4 Note: Typical specifications at room temperature 37.4x15.4x12.4 (950390315) 77 (35) without filter, 140 (63.5) with filter

-40 to -58 100-240/47-63Hz 85 N-Female 95%

-27 to +140 (-33 to +60) UL50E Type 4 / NEMA 4 Note: Typical specifications at room temperature 18.5 x 15.8 x 3.4 (470 x 400 x 87) 25.4 (11.5) 27.6 (12.5) 15 20

+28 (From Master Unit) Convection

-40 to +131 (-40 to +55) 95%

UL50E Type 4 / NEMA 4 Note: Typical specifications at room temperature 4 Port 8 Port 4 Port 8 Port Mechanical - MU Dimensions, H x W x D Weight (without bracket) Power Supply Power Consumption RF Connectors Operating Temperature Operating Humidity Environmental Class Mechanical - RU Dimensions, H x W x D Weight (without bracket) Power Supply Power Consumption RF Connectors Operating Temperature Operating Humidity Environmental Class Mechanical - EU Dimensions, H x W x D Weight (without bracket) Power Consumption (approx.) Power Supply Enclosure Cooling Operating Temperature Operating Humidity Enclosure Class ENU STATUS : 1-0-0 Copyright - refer to title page Page 19 INSTALLATION GUIDE FOR UHF DAS 3 INSTALLATION 3.1 WARNINGS AND ALERTS Radio Frequency Energy There may be situations, particularly for workplace environments near high-powered RF sources, where recommended limits for safe exposure of human beings to RF energy could be exceeded. In such cases, restrictive measures or actions may be necessary to ensure the safe use of RF energy. High Voltage The equipment has been designed and constructed to prevent danger, as far as reasonably practicable. Any work activity on or near equipment involving installation, operation or maintenance must be, as far as reasonable, free from danger. Where there is a risk of damage to electrical systems involving adverse weather, extreme temperatures, wet, corrosive or dirty conditions, flammable or explosive atmospheres, the system must be suitably installed to prevent danger. Protective Earthing Equipment provided for the purpose of protecting individuals from electrical risk must be suitable for the purpose and properly maintained and used. Handling Precautions This covers a range of activities including lifting, lowering, pushing, pulling, carrying, moving, holding or restraining an object, animal or person from the equipment. It also covers activities that require the use of force or effort, such as pulling a lever, or operating power tools. Where some of the abovementioned activities are required, the equipment must be handled with care to avoid being damaged. Electrostatic Discharge (ESD) Observe standard precautions for handling ESD-sensitive devices. Assume that all solid-state electronic devices are ESD-

sensitive. Ensure the use of a grounded wrist strap or equivalent while working with ESD-sensitive devices. Transport, store, and handle ESD-sensitive devices in static-safe environments. ENU STATUS : 1-0-0 Copyright - refer to title page Page 20 INSTALLATION GUIDE FOR UHF DAS 3.2 SITE PLANNING CONSIDERATIONS 3.2.1 SITE PLANNING Site Considerations Outdoor equipment is designed to be waterproof, rainproof, and with snow protection. Temporary protection should be taken when the equipment enclosure is opened for installation or maintenance in an outdoor environment. The equipment must not be opened for installation or maintenance in bad weather (e.g. gale, storm rainfall, extreme temperatures and high humidity) Installation Location Mounting surface shall be capable of supporting the weight of the equipment. In order to avoid electromagnetic interference, a proper mounting location must be selected to minimize interference from electromagnetic sources such as large electrical equipment. Environmental Humidity has an adverse effect on the reliability of the equipment. It is recommended to install the equipment in locations having stable temperature and unrestricted air-flow. The installation location for the product should be well ventilated. The equipment has been designed to operate at the temperature range and humidity level as stated in the product specifications in the datasheet. Direct sun light exposure to the equipment should be avoided. Provide additional shelter if necessary. Power Supply The power supply unit (PSU) provides power to all modules within the equipment. Depending on the product variant, it is recommended that the PSU be operated on a dedicated circuit breaker or fused circuit. Grounding Requirement Verify that the equipment has been well grounded. This includes antennas and all cables connected to the system. Ensure lightning protection for the antennas is properly grounded. Cable Routing Depending on equipment configuration, a variety of types of cables are required. Where applicable, ensure cables are properly routed and secured so that they are not damaged. Manual Handling During transportation and installation, take necessary handling precautions to avoid potential physical injury to the installation personnel and the equipment. ENU STATUS : 1-0-0 Copyright - refer to title page Page 21 INSTALLATION GUIDE FOR UHF DAS Working space available for installation and maintenance for each mounting arrangement. Ensure unrestricted 3.2.2 INSTALLATION CHECKLIST airflow. Ensure earth ground point is within reach of the ground wire. Ensure a power source is within reach of the power cord and the power source has sufficient capacity. Where appropriate, ensure unused RF connectors are terminated. Do not locate the equipment near large transformers or motors that may cause electromagnetic interference. Reduce signal loss in feeder cable by minimizing the length and number of RF connections. Ensure VSWR of antennas system < 1.5:1. Ensure equipment will be operated within the stated environment (see datasheet) Observe handling of all cables to prevent damage. Donor antenna should have a narrow beamwidth and positioned in line-of-sight (LOS) to the donor BTS site so that the donor signal level is maximized. This allows the use of minimum gain to achieve the maximum DL output power. The UL gain is typically set lower than or equal to the DL gain to minimize noise interference to the donor BTS Service antennas should be selected based on the type of service area, e.g., indoor antenna for indoor applications, and panel antenna for outdoor applications. ENU STATUS : 1-0-0 Copyright - refer to title page Page 22 INSTALLATION GUIDE FOR UHF DAS 3.3 INSTALLATION PROCEDURES 3.3.1 GOODS INWARDS INSPECTION Verify the number of packages received against the packing list. Check all packages for external damage; report any external damage to the shipping courier. If there is damage, a shipping agent should be present before unpacking and inspecting the contents because damage during transit is the responsibility of the agent. Open and check each package against the packing list. If any items are missing, contact Comba. Do not remove items from anti-static packing until ready for installation. If damage is discovered at the time of installation, contact the shipping agent. 3.3.2 TOOLS See Appendix A for a full list of the recommended tools required for installation and routine maintenance. 3.3.3 PREPARATION Wall mounting with the masonry bolts supplied, which make use of the outer holes. 3.3.4 WALL MOUNTING FOR MU AND RU Figure 11: Mounting Rack Overview Drill four holes on the wall using the position of four holes on the mounting rack as a guide. Fix the mounting rack to the wall using four masonry bolts (M10x110mm). ENU STATUS : 1-0-0 Copyright - refer to title page Page 23 814 INSTALLATION GUIDE FOR UHF DAS Install the Mounting Rack to the wall. Hang the equipment and secure the enclosure to the mounting rack. Figure 12: UHF PS DAS (MU and RU) Wall Mounting 3.3.5 DRIP-LOOP Comba recommends that every horizontal cable entry to the equipment forms a 'U' before its entry to the equipment. Water on the cable will drip down at the bottom of the loop and will not accumulate at the equipment connectors. 3.3.6 CABINET MOUNTING FOR EU Installation dimensions of Expansion Unit for cabinet mounting is shown as below:

ENU STATUS : 1-0-0 Copyright - refer to title page Page 24 Mounting RackExpansion Bolt M10X110ChassisM8X25,Hexagon Head,Flat Gasket,PadPylons ScrewWall INSTALLATION GUIDE FOR UHF DAS Figure 13: Dimension of Expansion Unit for Cabinet Mounting Cabinet installation:

The installation cabinet is a standard cabinet. The size of the Expansion Unit is the equipment used in the 2U cabinet. The cabinet needs to have enough space to install the 2U cabinet, and have self-prepared structural parts with pallets and M6 buckle nuts. The installation steps are as follows:

Adjust the 2U space on the upper side of the free pallet of the cabinet, install the square holes on the left and right columns, and install M6 snap nuts in the four holes with a spacing of 76.2mm;

Complete the external wiring connection of the equipment according to the equipment port and wiring Push the equipment into the cabinet along the pallet, align the mounting ear mounting holes of the equipment with the corresponding square holes of the cabinet [with M6 nuts], and use a "cross screwdriver" to set the " M6" in the packing box of the equipment 10, "Combination screw (T)" passes through the hanging ears and fastens to the Use the yellow-green ground wire in the accessories to reliably connect the equipment ground terminal and the requirements;

"M6 snap nut";

ground bar of the machine room;

The installation is complete. ENU STATUS : 1-0-0 Copyright - refer to title page Page 25 INSTALLATION GUIDE FOR UHF DAS Figure 14: Expansion Unit Cabinet Mounting 3.3.7 WALL MOUNTING FOR EU Installation dimensions of Expansion Unit for wall mounting is shown as below:

The wall-mounted installation steps are as follows:

Figure 15: Expansion Unit Wall Mounting ENU STATUS : 1-0-0 Copyright - refer to title page Page 26 INSTALLATION GUIDE FOR UHF DAS Remove the two mounting hangers from the Expansion Unit, adjust the direction according to Figure 9, and install it on the Expansion Unit. At the same time, install the remaining two mounting hangers attached in packing box on the Expansion Unit, as shown in Figure 16;

Figure 16: The mounting hangers of Expansion Unit On the selected wall, use a percussion drill and choose a suitable drill bit [8mm is recommended] to make a hole according to the size [465*246.5mm] in Figure 17, and the depth is about 50mm;

Figure 17: Hole punching diagram for Wall-mounted installation Remove the nut and washer of "M660, expansion bolt", insert the bolt and sleeve into the hole of the wall [the threaded end faces outward]; then hang the device on the bolt, and then pad it Use a wrench to tighten the screws for flat pads and spring pads, as shown in Figure 18;

Use the yellow-green ground wire in the accessories to reliably connect the equipment ground terminal and the ground bar of the machine room;

ENU STATUS : 1-0-0 Copyright - refer to title page Page 27 INSTALLATION GUIDE FOR UHF DAS The installation is complete. Figure 18: Expansion Unit Wall Mounting ENU STATUS : 1-0-0 Copyright - refer to title page Page 28 INSTALLATION GUIDE FOR UHF DAS 3.3.8 GROUNDING Ground Connection To ensure safe operation of the product, a ground (earth) connection is required. For single phase AC power source, the product must be grounded by connecting the earth wire of the power cord to the ground terminal of the AC supply. For operating this product with DC power systems (such as rectifiers), the product should not be connected to power systems that switch open the return lead because the return lead could function as the ground (earth) connection for the equipment. Protective Ground Connection The enclosure must be grounded securely by connecting a copper wire (CSA 16mm2) to the grounding terminal on the equipment/rack, and the other end to a protective ground (i.e. building earth point). An internationally acceptable color code of the ground connection wire is green/yellow. Such a ground connection implements the Protective Ground Connection, and must be connected to the equipment at the designated ground point. In general, do not connect the supply before establishing an adequate ground (earth) connection. Construct the ground wire, and use appropriate crimp connectors where necessary. Locate and connect the equipment grounding terminal to a protective ground (i.e. building earth point). 3.3.9 DC POWER CONNECTION FOR MU AND RU The positive pole of the external DC power supply is connected to terminal "0";

Figure 19: DC power connection for MU and RU ENU STATUS : 1-0-0 Copyright - refer to title page Page 29 Positvie Negative INSTALLATION GUIDE FOR UHF DAS Connect the negative pole of the external DC power supply to the terminal "-48V". 3.3.10 DC POWER AND MONITOR CABLE CONNECTION BETWEEN MU AND EU The power supply of the Expansion Unit is DC24V-DC48V, which can be directly supplied by the MU or DC48V Figure 20: DC power and Monitor cable connection independently. When powered by the MU, the main MU power supply line connection: VOUT+IN1+, VOUT-

IN1-; the standby MU power supply line connection: VOUT+IN2+, VOUT-IN2-;

Switch Cable connection: main MUEU: SWSW1; backup MUEU: SWSW2;

RJ45 Cable connection: main MUEU: FOUAUX1; backup MUEU: FOUAUX2. ENU STATUS : 1-0-0 Copyright - refer to title page Page 30 RJ45 CableSW CablePower cableSW of MU(Backup Unit)MU(Main Unit)EUMU(Backup Unit) INSTALLATION GUIDE FOR UHF DAS 3.3.11 DC POWER AND MONITOR CABLE CONNECTION BETWEEN EU AND EU Figure 21: DC power and Monitor cable connection for EU Power CableOUT+IN1+OUT-IN1-

Monitor CableADD_OUTADD_IN RJ45 CableAUX3AUX1 3.3.12 RF CABLE CONNECTION UHF PS DAS RF cables connection is as follows:

UHF PS DAS MU DT/DL IN port Connects to the feeder cable from the donor antenna. UHF PS DAS MU MT/DL OUT port Connects to the feeder cable from the service antenna infrastructure. UHF PS DAS MU IN1/OUT1 ports Connects to UL1/DL1 or UL2/DL2 UHF PS DAS RU MT port Connects to the feeder cable from the service antenna infrastructure. 3.3.13 WEB ACCESS Connect OMT or LAN using regular Ethernet cable, then use the correct IP address in the browser to access to the WEB GUI 3.3.14 DRY CONTACT CABLE Below please find the pin definitions of Dry Contact Cables. Table 4: Pin Definition of Dry Contact Cable Pin NO. Pin Input ALM1 ENU STATUS : 1-0-0 Copyright - refer to title page Page 31 Power CableMonitor CableRJ45 Cable EU 1 EU 2 INSTALLATION GUIDE FOR UHF DAS 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 CLOSE1 COM1 OPEN1 CLOSE2 COM2 OPEN2 CLOSE3 COM3 OPEN3 CLOSE4 COM4 OPEN4 CLOSE5 COM5 OPEN5 CLOSE5 COM5 OPEN5 EXT ALM1 EXT ALM2 EXT ALM3 EXT ALM4 GND GND GND GND NC ALM2 AUX Dry contact status:

Main Power Normal/Lost dry contact status:

1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 ENU STATUS : 1-0-0 Copyright - refer to title page Page 32 INSTALLATION GUIDE FOR UHF DAS Pin definition of ALM and AUX connectors:

End of Section ENU STATUS : 1-0-0 Copyright - refer to title page Page 33 INSTALLATION GUIDE FOR UHF DAS 4 WEB GUI The UHF PS DAS can be monitored and controlled via the WEB GUI; use the following guide to finish system parameter setting and commissioning. 4.1 WEB GUI CONNECTION Step 1: Connect the OMT port to the PC RJ45 port OF MU with the supplied RJ45 cable to set up a physical connection. Step 2: Open a browser (suggested is the Firefox browser, display resolution is 1024768), input Web GUI IP address:

192.168.8.101, click [Enter]. NOTE: DHCP and DNS are also available to login to the Web GUI. Figure 22: Input IP Address Step 3: Input User Name: admin; Password (default password: admin). Click [Log in]. Figure 23: Input User Name and Password ENU STATUS : 1-0-0 Copyright - refer to title page Page 34 INSTALLATION GUIDE FOR UHF DAS 4.2 WEB GUI INTRODUCTION After log in, the Web GUI main screen will appear. Figure 24: Web GUI Main Screen On Comba Web GUI Home Screen, there are four Menu bars:

[Dashboard], [Overview], [Tools], [Device]and [Management]. The [Dashboard] Screen shows system topology diagram. Dashboard Screen Figure 25: Dashboard Screen The [Tools] shows Commission, Scan Device, Reset, etc. Commission screen The page shows Channel Frequency Information- Class A ENU STATUS : 1-0-0 Copyright - refer to title page Page 35 INSTALLATION GUIDE FOR UHF DAS The page shows Sub Band Information-Class B. Figure 26: Chanel Frequency Info Figure 27: Sub Band Info End of Section ENU STATUS : 1-0-0 Copyright - refer to title page Page 36 INSTALLATION GUIDE FOR UHF DAS 5 COMMISSIONING 5.1 PRE-COMMISSIONING TASKS After equipment installation, perform the following steps before equipment powering and commissioning:

Prepare the channel frequencies. Verify that the expected voltage, current and power levels do not violate any ratings. Visually inspect the power connection within the equipment. Ensure that the power cable is correctly and securely connected, including the grounding wire, RF cable and other cables. Check the grounding connection and verify that the ground resistance is less than 5. Test the antenna system and ensure that the echo loss within working frequencies is less than -14dB (VSWR<1.5). 5.2 COMMISSIONING PROCEDURE Perform the following procedures for system commissioning. Table 5: Commissioning Task Explanation Commissioning Tasks Observation 1. Set filter frequencies 2. Go through commissioning process 3. Turn on 700/800MHz switches, turn on filter switches 4. Determine system downlink gain and uplink gain for each filter 5. Fine tuning the gain 6. Alarm Setting Review In Master Unit Device page or on each individual units page Update the frequency for each filter in the device page In Master Unit Commissioning page Scan system elements Update units information Isolation test Uplink Calibration Downlink Calibration In Master Unit Device page or on each individual units page Turn on the switches for 700/800MHz and switches for each filter In Master Unit Device page Determine and set the downlink or uplink gain based on the downlink input power / the link budget calculation or the design In each individual units page You must fine tune the gain individually on each unit In Master Unit Management page or on each individual units page Review the alarm setting for Donor Antenna monitoring, and for dry contact alarms End of Section ENU STATUS : 1-0-0 Copyright - refer to title page Page 37 INSTALLATION GUIDE FOR UHF DAS 6 MAINTENANCE The UHF PS DAS is designed for trouble-free operation and generally does not need maintenance. Maintenance activities should only be carried out by trained personnel. Periodic inspection of the UHF PS DAS equipment(s) is recommended - the recommended tasks includes:

Verify the direction and position of antennas. Re-align if necessary. Make sure the cable connector and sealing on the RF cable connectors are not damaged. Verify lightning and grounding protection is in good condition. End of Section ENU STATUS : 1-0-0 Copyright - refer to title page Page 38 INSTALLATION GUIDE FOR UHF DAS 7 APPENDICES 7.1 APPENDIX A: TOOLS The following are the recommended list of tools for new installation and routine maintenance. Slotted Screwdriver Philips Screwdriver Ring Spanner (Assorted size: 12~20mm) Electrically operated drill and masonry drill bits 12mm Anti-static Wrist Strap Side Cutter Frequency Counter (e.g. FLUKE PM6685R) RF Power Meter (e.g. Bird 5000) ENU STATUS : 1-0-0 Copyright - refer to title page Page 39 INSTALLATION GUIDE FOR UHF DAS 7.2 APPENDIX B: DECLARATION OF HARMFUL SUBSTANCES AND CONTENT Product Name: Public Safety UHF DAS System Harmful substance and content of this product as below table shown:

Part Name A B Pb Harmful Substance Hg Cd Cr (VI) PBB PBDE Note: Above table complies with SJ/T 11364.

: Indicates that the harmful substance content in all homogeneous materials for corresponding part is under the limited requirement of GB/T 26572.

: Indicates that the harmful substance content in at least one single homogeneous material for the corresponding part exceeds the limited requirement of GB/T 26572. Remark: The content of the parts marked with above exceeds the requirement as there is still no mature alternative technologies to achieve the replacement of poisonous and harmful materials or elements. ENU STATUS : 1-0-0 Copyright - refer to title page Page 40 INSTALLATION GUIDE FOR UHF DAS 7.3 APPENDIX D: RMA (RETURN MATERIAL AUTHORIZATION) ENU STATUS : 1-0-0 Copyright - refer to title page Page 41 INSTALLATION GUIDE FOR UHF DAS ENU STATUS : 1-0-0 Copyright - refer to title page Page 42

RHASV2F-B-AC FCC ID: PX8RH4SV2F-B This is a 90.219 class B device complies with FCC part 90 signal booster rules. lwww.comba-telecom.com Comba Telecom Network Systems Limited Comba RH4SV2F-B-AC Public Safety UHF DAS Remote Unit ISIN:

JERP#:

Iran:

Print barcode Comba Telecom Network Systems Limited CriticalPoint Comba

| WARNING. This is NOT a CONSUMER device. It is designed for installation by FCC LICENSEES and QUALIFIED INSTALLERS. You MUST have an FCC LICENSE or express consent of an FCC Licensee to operate this device. You MUST register Class B signal boosters (as defined in 47 CFR 90.219) online at www.fec.gov/signal-boosters/registration,

[Unauthorized use may result in significant forfeiture penalties, including penalties in excess of $100,000 for each continuing violation. Comba Telecom Network Systems Limited

Comba Telecom Network Systems Limited Flat/Rm 10, 3/F, Bio-

Informatics Ctr, 2 Science Park West Avenue, HK Science Park, Pak Shek Kok, N.T. H ong Kong Authority to Act as Agent Date: January 6, 2022 American Certification Body, Inc. 6731 Whittier Avenue Suite C110 McLean, VA 22101 To Whom It May Concern:

Guangzhou Grg Metrology & Test Co Ltd / Krystal Yang is authorized to act on our behalf, until otherwise notified, for applications to American Certification Body, Inc. (ACB). We certify that we are not subject to denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. Further, no party, as defined in 47 CFR 1.2002 (b), to the application is subject to denial of federal benefits, that includes FCC benefits. We also declare that the information provided to the FCC is true and correct to the best of our knowledge (47 CFR 2.911(d)) and we have been informed of the grantee responsibilities (47 CFR 2.909) with regard to certified equipment. Thank you, Agency Agreement Expiration Date: _____2022/1/6___ By:

Title: Director On behalf of: _Comba Telecom Network Systems Limited Telephone: +86 (020) 2839 0000 __________________________

(Signature1)

(Print name) Ronin Gong

(Company Name) 1 - Must be signed by applicant contact given for applicant on the FCC site, or by the authorized agent if an appropriate authorized agent letter has been provided. Letters should be placed on appropriate letterhead. 102920 13

Comba Telecom Network Systems Limited Flat/Rm 10, 3/F, Bio-Informatics Ctr, 2 Science Park West Avenue, HK Scie nce Park, Pak Shek Kok, N.T. Hong Kong To:American Certification Body. Inc. (ACB) From: Comba Telecom Network Systems Limited Flat/Rm 10, 3/F, Bio-Informatics Ctr, 2 Science Park West Avenue, HK Science Park, Pak Shek Kok, N.T. Hong Kong Regarding Confidentiality Request regarding application for FCC ID: PX8RH45V2F-B According to FCC KDB 935210 D02 Signal Boosters Certification v04r02 section V(g) requirement;

(g)Attestation(must be non-confidentical exhibit, signed by the applicant; signature by test lab, agent, or TCB is not acceptable)should include:

(1) Warning label messages and Class A/B disclosure will be also shown in online and point-of-sale marketing materials and outside packaging of device;

We Comba Telecom Network Systems Limited declared our Warning label message and Class A/B disclosure will be also shown in online and point-of-sale marketing materials and outside packaging of device;

For FCC ID: PX8RH45V2F-B THIS IS A 90.219 CLASS B DEVICE. WARNING. This is NOT a CONSUMER device. It is designed for installation by FCC LICENSEES and QUALIFIED INSTALLERS. You MUST have an FCC LICENSE or express consent of an FCC Licensee to operrate this device. The PS BDA can be configured as Class B (FCC ID: )Signal Booster. You MUST register Class B signal boosters(as defined in 47 CFR 90.219)online at www.fcc.gov/signal-boosters/registration. Unauthorized use may result in Significant forfeiture penalties, including penalties in excess of $100,000 for each continuing violation. WARNING: This is NOT a CONSUMER device. It is designed for installation by an installer approved by an ISED licensee. You MUST have an ISED LICENSE or the express consent of an ISED Licensee to operate this device. Sincerely, Name(Printed)Ronin Gong Title Director Signature On behalf of Company: Comba Telecom Network Systems Limited

Declaration of conformity We, Comba Telecom Network Systems Limited

(Name of manufacturer or his authorized representative) Flat/Rm 10, 3/F, Bio-Informatics Ctr, 2 Science Park West Avenue, HK Science Park, Pak Shek Kok, N.T. Hong Kong Declare under our own responsibility that the operation frequency of the product Name:Public Safety UHF DAS Remote Unit Model: RH45V2F-B-48 , RH45V2F-B-AC is authorized frequencies below:

450MHz~512MHz: Downlink450MHz ~ 512MHz, Uplink: 450MHz ~ 512MHz We are acknowledging that the FCC rules are violated if the device operates on unauthorized frequencies. In additionally, please be kindly noted that the warning label messages and the Class B disclosure will be also shown in online and point-of-sale marketing materials and on outside packaging of device. Hong Kong 6/1/21

(Place, date) (Name and signature of person responsible)