FCC ID: 2AW6F-BLR200 Belun Ring Pulse Oximeter

6. Click the button Export to save the record to the local storage. 14. DEVICE INFORMATION Connect the Ring to BRM and the following information of the device are shown. 4. PACKAGE CONTENT 7. USE BELUN RING FOR SPOT CHECK Ring Arm x 6 Ring Ruler Perform spot check of the oxygen saturation (SpO2) and pulse rate

(PR). 1. Start BRM and go to the Spot Check Mode. 2. Connect the Ring to BRM (Refer to section 6.2 Configure Belun Ring) 3. Wear the Ring and the measurement will start. Refer to 9. TIPS TO WEAR THE RING to ensure the Ring is worn properly. is facing up Charging Cable Installation Disc 5. PARTS AND STATUS LIGHTS Keep the Ring steady on the finger during a recording 8.4 Erase the Measurement Record Erase any unwanted record by clicking the button Delete next to each record or erase all the records by clicking the button Erase All. 5.1 Parts Ring Arm Sensor Area 4. The measurement result will be shown on BRM. Problem Possible Cause(s) The Ring Status Light is Flashing Red. The Ring is malfunctioning. Any records that are erased are not recoverable. Attention The Ring Status Light is Solid Red. 9. TIPS TO WEAR THE RING Slide the Ring on the index finger all the way until it meets the palm. Ensure the symbol is facing up as shown in the illustration.. is facing up The Ring battery is too low to start a measurement. The device clock has not been synchronized. The Ring Status Light does not turn On when the Ring is moved. The Ring is in the power saving mode because the battery is nearly depleted. Device Status Device Battery Level Device Clock

(DD/MM/YYYY HH:MM:SS Timezone) Device Serial Number Device Firmware Version 14.1 Device Status Move the mouse pointer to the symbol will show the status information of the device. 14.2 Device Battery Level The symbol indicates that the battery is charging. 15. TROUBLESHOOTING Possible Solution(s) Connect the Ring to Belun Ring Management to determine the error. Charge the Ring. Refer to the section 11. CHARGE THE BATTERY for details. Synchronize the device clock by connecting it to Belun Ring Management. Charge the Ring. Refer to the section 11. CHARGE THE BATTERY for details. Refer to this section for details. Charge the Ring. Refer to the section 11. CHARGE THE BATTERY for details. The Ring Status Light is Solid Red and the Ring is not ready for a new recording. If the Ring Status Light is off, the Ring is in the power saving mode. The Ring does not vibrate when it is worn on the finger. The Ring does not charge (Ring Status Light is not Breathing Green) when it is inserted in the Cradle. The Ring is fully charged. The Ring does not charge when the battery is full. The Ring will not start a measurement when the Ring Status Light is Solid Red. Note Please contact the local distributor or Belun Technical Support, if any problem persists after performing the above possible solutions if you have any other problems with this device, such as setting up, maintaining, or using the device if any unexpected operations or events occur. Belun Technical Support Email: support@beluntech.com Do not attempt to open or repair this device by yourself. Attention 16. CARE AND MAINTENANCE 16.1 Cleaning and Disinfecting For cleaning and disinfecting the Ring, the following procedures are recommended:

Clean and disinfect the Ring whenever you see any type of contamination. Clean and disinfect the Ring prior to giving to a new patient. Before cleaning and disinfecting, disconnect the Ring from any power source or computer. Clean the Ring and once per week or more frequently if needed. Gently wipe the exposed surface of the Ring with a soft cloth dampened with 70% isopropyl alcohol. Dry with a soft cloth or allow it to air dry before use. Disinfect the Ring when needed after cleaning. Disinfect by gently wiping the cleaned sensor area of the Ring with a soft cloth dampened with 70% isopropyl alcohol. Dry with a soft cloth or allow it to air dry before use. Ensure the cloth is not dripping with liquid as the excessive liquid could damage the device. 70% isopropyl alcohol is both a cleaning agent and a disinfecting agent. Refer to the agent labeling for preparation and use instructions. Do not spray any liquid on this device directly or let water drop or flow into any part of the device. High temperature or high-pressure steam disinfection is not recommended for this device. 16.2 Maintenance and Battery Charging This device requires no calibration or maintenance other than battery charging. Please charge the Ring when the Ring Status Light is Solid Red indicating the battery is low The Ring can be charged by connecting the USB-C port to a 5V DC power source using the provided charging cable. When the Ring is charging, the Ring Status Light will Breathing Green. The device should be recharged every 3 months when it is not regularly used. If the battery is depleted, it may take longer charging time ~10 minutes before it returns to normal function. Do not use the device when the Ring is being charged. 16.3 Transportation and Storage The packaged or unpackaged device can be transported by ordinary conveyance or according to transport contract. The device cannot be transported with toxic, harmful, or corrosive material. The packaged or unpackaged device should be stored indoor without corrosive gases and with good ventilation. The environment parameters are:

- When this symbol is shown, motion artifact is detected. The measured parameters are updated in every second. The Ring should be close to the computer to ensure a stable connection. BRM will disconnect the Ring if no data is received for 4 seconds. Reconnect the Ring if need. Note Note Note 8. USE BELUN RING FOR RECORDING Perform continuous data recording of oxygen saturation (SpO2) and pulse rate (PR). 8.1 Start the Recording Session 1. 2. Start BRM and go to the Spot Check Mode. Connect the Ring to BRM (Refer to section 6.2 Configure Belun Ring) 3. Click the button Go Recording . 4. Confirm the device battery is sufficient and any record in the device can be erased. 5. BRM disconnects the Ring automatically and the Ring is ready for recording. The Ring operates on the side of an index finger. It is designed to function on either left or right hand. The non-dominant hand is recommended. The Ring should be worn to the base of the finger (proximal phalanx). The correct way to wear is illustrated below:

A few common incorrect ways to wear are illustrated below:

The Ring is rotated. The Ring is upside down. 10. CHANGE THE RING ARM The Ring is pre-installed a Ring Arm and there are spare Ring Arms included. The Ring Arms are designed to fit for different fingers. Refer to the table below for the range of finger size of each Ring Arm. Ring Arm Finger Size Ranges*

Measure the circumference here 5 6 7 8 9 10 11 48 - 51 mm 52 - 54 mm 55 - 57 mm 58 - 60 mm 61 - 63 mm 64 - 66 mm

> 66 mm 6. Wear the Ring and the recording will start. Refer to 9. TIPS TO WEAR THE RING to ensure the Ring is worn properly. is facing up Keep the Ring steady on the finger during a recording

*The circumference of the base section of the index finger (round down to the nearest integer).

* The accuracy for patients with BMI > 39.5 is not guaranteed. 10.1 Remove the Ring Arm Press the Ring Arm at the top along the indicated direction below to remove it from the Ring. Do not push the Ring Arm in other directions to avoid any damage. The Ring sensor emits red and infrared lights throughout the whole recording until the Ring is removed from the finger. Only measurement of 30 seconds or longer will be recorded. If the Ring battery has been completely depleted, the Ring should be configured again before use. Note Note Note If the Ring has not been configured, it cannot record any measurement. Attention 8.2 End the Recording Session Remove the Ring from the finger to end the recording session. 8.3 View and Export the Results 1. 2. 3. 4. Start BRM and click the button Spot Check Mode to switch to the Export Mode. Connect the Ring to BRM (Refer to section 6.2 Configure Belun Ring) BRM displays the device information and list out the measurement summary of the connected Ring. Click the button View on the right of each measurement record entry to view the record. 10.2 Install the Ring Arm Place the groove side of the Ring Arm against the tongue side of the Ring and slide the Ring Arm upward until it clicks. The Ring Arm may become loose and fall off easily after prolonged use. If that happens, please contact the local distributor or Belun Technical Support for a replacement. Note 11. CHARGE THE BATTERY 1. Connect the Ring to the charging cable. Belun Ring Wireless Pulse Oximeter Model: BLR-200 Operators Manual 1. INTRODUCTION Rev01 This Operators Manual is written and compiled according to US FDA 21 CRF part 820. Subject to modifications and software upgrades, information in this document may change without notice. This manual describes the guidelines of using Belun Ring BLR-200 wireless pulse oximeter. Please read this manual carefully before using this product. This manual which describes the operating procedures should be followed strictly. Failure to follow may cause measuring abnormality, equipment damage and human injury. The manufacturer is NOT responsible for the safety, reliability and performance issue and any monitoring abnormality, human injury, and equipment damage due to users negligence of the operation instructions. The manufacturers warranty service does not cover such faults. This product is calibrated before leaving factory. Belun reserves the right to revise and improve this manual and the products it describes at any time, without notice or obligation. 2. PRODUCT DESCRIPTION 2.1 Intended Use Belun Ring BLR-200 is a wireless, non-invasive and stand-alone pulse oximeter intended to be used for spot-checking and/or continuous data collection and recording of oxygen saturation of arterial hemoglobin (SpO2) and the pulse rate of adult patients through index finger in hospital and home environment for up to ten hours, during no motion and motion conditions, and for patients who are well or poorly perfused. It is not intended for single-use and out-of-hospital transport use and does not have alarms. 2.2 Contraindications Do not use this device in a Magnetic Resonance (MR) Ring Status Light Connection Area 5.2 Status Lights Color(s) & Pattern(s) Meaning(s) Solid Green The Ring is ready for recording. Breathing Green The Ring is charging. Solid Red Flashing Red The Ring is not ready for a new recording. Refer to the section 14. TROUBLESHOOTING for details. There is a hardware issue in the Ring. Refer to the section 14. TROUBLESHOOTING for details. The Ring is standby. Move the Ring to wake it up. Or, the Ring is recording a measurement, or the Ring is power off. environment or in the presence of flammable anesthetics or gases. Off This device is not defibrillation proof per IEC 60601-1. This device should not be used:

6. PREPARATION during cardiopulmonary resuscitation, on hypovolemic patients, for assessing the adequacy of ventilator support, or for detecting worsening lung function in patients on a high concentration of oxygen. This device should not be used for treatment nor monitoring. Do not use this device when SpO2 or pulse rate alarms are required. Attention This device should not be used for life-support and diagnosis purposes. Attention This device has motion tolerant software that minimizes the likelihood of motion artifacts being misinterpreted as good pulse quality. Attention If you have difficulties in understanding this operators manual, you should operate this device only with the assistance from someone who can understand this operators manual. Note 3. SAFETY WARNINGS AND CAUTIONS 3.1 General Check the package before use to ensure the device and parts are in accordance with the package list. Please contact customer service if there is any missing component. The included device and parts are designed to use together. Using other parts may cause injury to the patient or damage to the device. To prevent malperformance and/or patient injury, verify the compatibility of any accessory before use. When this device is used by the patient, the patient is the intended operator. The patient can use and maintain this device and its parts according to this manual. This device should not be used or interconnected with any other parts, accessories or equipment not specified in this manual. For cleaning and disinfecting, follow the direction of the section 15. CARE AND MAINTENANCE. The expected service life of the device is 3 years since its first use. 3.2 Safety The light emitting from this device is harmful to the eyes. Refrain from staring at the light. Keep this device away from children or pets. This device contains small parts that could cause choking; the cable could cause strangulation. Avoid excessive pressure to the sensor application site as this may cause damage to the skin beneath the sensor. 3.3 Limitation of Use This device is to put into service according to the EMC information provided. Portable and mobile RF communication equipment may affect this device. Use the Ring on index finger only. Using it with any other fingers may affect the performance. Patient should not use skin-care product on the finger being measured (index finger). Pain or discomfort may occur when using this device continuously, especially for microcirculation barrier patients. It is recommended that the sensor should not be applied to the same finger for over 10 hours. For patients with special needs, please be cautious when using the device. This device cannot be used on edema or tender tissue. Patients allergic to TPE (Thermoplastic elastomers),PC

(Polycarbonates) and ABS (Acrylonitrile Butadiene Styrene) should not use this device. This device is not recommended for patients who have significant skin pigmentation on the measurement site, e.g., tattoos, skin wound, etc. This device is not recommended for patients who suffer from smoke inhalation or carbon monoxide poisoning. This device may not work on every patient. If stable readings are unachievable, consider stop using this device. The accuracy for patients with BMI > 39.5 is not guaranteed. The interferences that may affect the accuracy of measurement include, but not limited to, excessive ambient light, excessive motion, restriction in blood flow, moisture in the sensor, low perfusion, venous pulsations, anemia, carboxyhemoglobin, methemoglobin, dysfunctional hemoglobin, improperly applied device, electrosurgical interference, and intravascular dyes. 3.4 Battery The battery should be charged at least every 3 months to maintain its working life. Connect to a 5V DC power source to charge the battery, or else it may damage the device. Do not use this device while charging. The battery is non-removable and not user-replaceable. 3.5 Maintenance This device is a precision electronic device and necessary maintenance must be performed by Belun Technical Service ONLY except charging the battery. No modifications to this device are allowed as it may affect the device performance. Do not break the casing of the device as it may damage the sensor, which may lead to malfunction, and/or inaccurate measurement. Check the device and other parts at least once a week to ensure there is no visible damage that may affect safety and performance of this device. When obvious damage is observed, stop using this device. Do not service or maintain any part of this device while it is being used with a patient. A functional tester cannot be used to assess the accuracy of this device. 3.6 Environment Keep this device away from dust, lint, vibration, corrosive substances, explosive materials, high temperature and moisture. Before the first use, the following steps should be performed Install the Companion Application (6.1) Configure Belun Ring (6.2) 6.1 Install the Companion Application - Belun Ring Management (BRM) System Minimum Requirements Operating system: Windows 10 Home/Professional 64 bit RAM: 4GB Hard drive space: 13 MB Display resolution: 1280*960 Bluetooth 5.0 Locate the BRM Installer The installer is stored in the installation disc. Follow the steps below to access it. 1. Insert the installation disc into the disc drive of the computer. 2. Go to This PC in File Explorer in the computer and find the drive Belun. 3. The installer is stored in the drive Belun. Install the BRM Application 1. 2. Run the installer Belun Ring Management vX.X.X.msi in the drive Belun. The installation will start automatically. Follow the on-screen instructions until the installation is complete. 3. If a dialog asking Do you want to allow this app from an unknown publisher to make changes to your device? shows up, click Yes to allow the installation to continue. 4. Wait until the installation is done. 6.2 Configure Belun Ring 1. Power on the Ring by connecting it to a power source (5V DC) using the charging cable. 2. Start BRM by double clicking the shortcut icon on the desktop. 3. Choose the Device Model and log in using the default password BeWell222. Note: The password can be changed by clicking Change Password at the menu bar. 4. Conform to allow the necessary access permission. 5. Connect the Ring via Bluetooth by selecting the Ring SN and click the button BLE Connect. 6. Enter the device PIN for authentication. 7. The Ring will be configured automatically i.e. synchronize the clock when the connection is established. If this device gets wet, stop using it and let it completely dry 6.3 Device Self-Test before use. When it is carried from cold environment to warm or humid environment, do not use it immediately. The Ring performs a self-test when it is power on. In case of any error, the Ring Status Lights will Flash Red. Refer to the section 14. TROUBLESHOOTINGfor solution. The performance will be affected if there is any obstacle such Flashing Red as dust, lint, or stain on the sensor area. When necessary, clean the sensor area by following the direction in this manual. 2. Connect the charging cable to a 5V DC power source. 3. The Ring Status Light will Breathe Green during charging. Breathing Green Temperature

-10 C - +60 C Relative Humidity 95%

Atmospheric Pressure 500hPa - 1060hPa 4. The Ring Status Light will become Solid Green when the Ring is fully charged. After being transported or stored in the minimum or maximum temperature, the device should wait for~ 1 hour before use if the ambient temperature is 20 C. Solid Green 16.4 Disposal 5. The measurement data of the selected record are shown in the chart. A data tooltip shows up when the mouse hovers on any data point. 12. POWER OFF THE DEVICE FOR STORAGE 1. 2. 3. 4. Disconnect the Ring from the charging cable. Start BRM and go to Spot Check Mode. Connect the Ring to BRM Click the button Power Off Follow the local laws and regulations to dispose of scrap parts, accessories, and packaging (including battery, plastic bags, foams, and paper boxes). Data Tooltip Chart Descriptions 5. The Ring will vibrate for ~1 second to indicate it is power off. 03:20:39 X-axis Data time in HH:MM:SS format 13. FACTORY RESET SpO2 (%) 98 Blue line PR (bpm) 52 Red line Signal Good Gray bar Oxygen saturation in percentage (%) Range: 70 - 100%

Pulse Rate in beat-per-minute (bpm) Range: 30 - 250 bpm Signal Inadequacy Indicator:

Signal quality of the overlapping data area is bad due to motion, low perfusion or poor pulse signal Value: Good or Bad If the data value is --, the data value is not available. 1. 2. 3. 4. 5. 6. Disconnect the Ring from the charging cable. Start BRM and go to Spot Check Mode. Connect the Ring to BRM Click the button Factory Reset The Ring will vibrate for ~1 second and power off. Power on the Ring by connecting it to a power source. motion artifact simulation introduced by a pulse oximeter tester. This test determines whether the oximeter meets the criteria of ISO 80601-2-61 for SpO2 and pulse rate during simulated movement, tremor, and spike motions. The accuracy for patients with BMI > 39.5 is not guaranteed. Attention Guidance and manufacturers declaration - electromagnetic immunity Portable and mobile RF communications equipment should be used no closer to any part of BLR-200, including cables, than the recommended separation distance calculated from the equation applicable to the frequency of the transmitter. 19. SYMBOLS The symbols that are found in this manual and on the BLR-200 are described below. Symbols Description Caution is designed and manufactured by Belun Technology Company Limited Unit 218, 2/F, Core Building 2 No. 1 Science Park West Avenue Hong Kong Science Park, Shatin Hong Kong, China

+852-3706 5640 info@beluntech.com beluntech.com belun, belun ring, and their respective logos are either registered trademarks or trademarks of Belun Technology Company Limited in Hong Kong, the United States, and/or other countries or regions. 2017-2023, Belun Technology Company Limited. All rights reserved. Consult Instruction for Use Follow Instruction for Use No Alarms Type BF-Applied Part (patient isolation from electrical shock) Avoid Sunlight Keep Dry Protected against dripping water and against access to hazardous parts with finger, per IEC60529. Direct Current Bluetooth Figure Mark Date of Manufacture Serial Number Lot Number Recyclable material Separate collection for WEEE- Waste of electrical and electronic equipment from other household-type waste. Please recycle if possible. Storage/Shipping Temperature Range Storage/Shipping Humidity Range Storage/Shipping Pressure Range Medical Prescription Required The Bluetooth word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Belun Technology Company Limited is under license. Other trademarks and trade names are those of their respective owners. 17.5 Radio Information Bluetooth LE Wireless Technology Information Modulation Type GFSK Max. Output Power see test report Frequency Range 2402MHz - 2480MHz Antenna Peak Gain

+1.8dBi Recommended Range

<10m Radio Compliance Radio Modes Bluetooth LE 5.0 The wireless medical device is home-use in the 2.4GHz band. Potential interferers include: IEEE 802.11b/g/n networks (2.4GHz), B/T BTLE devices, and home wireless telephones (2.4GHz). Federal Communications Commission (FCC) Notice Potential For Radio / Television Interference (for U.S.A. only) 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: This device has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This device generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this device does cause harmful interference to radio or television reception, which can be determined by turning the device off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna. Increase the distance between the device and the receiver. Connect the device to an outlet on a circuit different from the outlet to which the receiver is connected. Consult the dealer or a qualified radio/TV technician for assistance. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. 18. MANUFACTURERS DECLARATION The following tables describe specific information regarding this devices compliance to IEC 60601-1-2. Essential performance of the BLR-200 is defined as SpO2 accuracy and pulse rate accuracy. Accuracies may be affected as a result of exposure to electromagnetic disturbances that are outside of the environments listed in the PRODUCT DESCRIPTION and SAFETY WARNINGS AND CAUTIONS. If issues are experienced, move the Belun device away from the source of electromagnetic disturbances. Emission table for IEC 60601-1-2, 4th edition:

Guidance and manufacturers declaration - electromagnetic emissions This BLR-200 is intended for use in the electromagnetic environment specified below. The operator of BLR-200 should ensure that it is used in such an environment. Emissions Test Compliance RF Emissions CISPR 11 Group 1 RF Emissions CISPR 11 Class B Harmonic emissions IEC 61000-3-2 N/A Voltage fluctuations /

flicker emissions IEC 61000-3-3 N/A Electromagnetic Environment Guidance BLR-200 uses RF energy only for its internal function. Therefore, its RF emissions are very low and are not likely to cause any interference in nearby electronic equipment. BLR-200 is suitable for use in all establishments, including domestic establishments and those directly connected to the public low-voltage power supply network that supplies buildings used for domestic purposes. Immunity test standard IEC 60601 test level Compliance level Electrostatic discharge

(ESD) IEC 61000-4-2 8 kV contact 15 kV air 8 kV contact 15 kV air Electrical fast transient/burst IEC 61000-4-4 Surge IEC 61000-4-5 2 kV for power supply lines 1 kV for input/output lines 1 kV line(s) to line(s) 2 kV line(s) to earth Voltage dips, short interruptions and voltage variations on power supply lines IEC 61000-

4-11

<5% UT

(0.5 cycle) 40% UT (5 cycles) 70% UT

(25 cycles)

<5% UT for 5 s N/A N/A N/A Power frequency

(50/60 Hz) magnetic field IEC 61000-4-8 30 A/m 50/60 Hz 30 A/m 50/60 Hz Electromagnetic Environment Guidance Floors should be wood, concrete, or ceramic tile. If floors are covered with synthetic material, the relative humidity should be at least 30%

Mains power quality should be that of a typical commercial or hospital environment. Mains power quality should be that of a typical commercial or hospital environment. Mains power quality should be that of a typical commercial or hospital environment. If the user of the BLR-200 requires continued operation during power mains interruptions, it is recommended that the BLR-200 be powered from an uninterruptible power source. Power frequency magnetic fields should be at levels characteristic of a typical location in a typical commercial or hospital environment. Note: UT is the AC mains voltage prior to application of the test level. Immunity Test IEC 60601 Test Level Compliance Level Conducted RF IEC 61000-4-6 3 Vrms 150 kHz to 80 MHz N/A 10 V/m 80 MHz to 2.7 GHz 10 V/m 80 MHz to 2.7 GHz 27 V/m pulse modulation 385 MHz 9 V/m pulse modulation 710 MHz, 745 MHz, 780 MHz, 5240 MHz, 5500 MHz, 5785 MHz 28 V/m frequency modulation 450, MHz;

28 V/m pulse modulation 810 MHz, 870 MHz, 930 MHz, 1720 MHz, 1845 MHz, 1970 MHz, 2450 MHz 28 V/m frequency modulation 450, MHz;

28 V/m pulse modulation 810 MHz, 870 MHz, 930 MHz, 1720 MHz, 1845 MHz, 1970 MHz, 2450 MHz Radiated RF IEC 61000-4-3 up to 28 V/m pulse modulation at frequencies in ISM bands note 1 Radiated RF IEC 61000-4-3 up to 28 V/m pulse modulation at frequencies in ISM bands note 1 Recommended separation distance d = 1.2 P 150 kHz to 80 MHz d = 0.35 P 80 MHz to 800 MHz d = 0.7 P 800 MHz to 2.7 GHz d= 0.23P 385 MHz d= 0.39P 710 MHz, 745 MHz, 780 MHz;

d= 0.78P 5240 MHz, 5500 MHz, 5785 MHz d= 0.13P 450 MHz;

d= 0.25P 810 MHz, 870 MHz, 930 MHz, 1720 MHz, 1845 MHz, 1970 MHz, 2450 MHz Where P is the maximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer and d is the recommended separation distance in meters (m). Field strengths from fixed RF transmitters, as determined by an electromagnetic site survey note 2 should be less than the compliance level in each frequency range note 3. Interference may occur in the vicinity of equipment marked with the following symbol:

note 1:

Refer to IEC 60601-1-2:2014:Table 9 note 2:

Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile radios, amateur radio, AM and FM radio broadcasts and TV broadcasts cannot be predicted theoretically with accuracy. To assess the electromagnetic environment due to fixed RF transmitters, an electromagnetic site survey should be considered. If the measured field strength in the location in which BLR-200 is used exceeds the applicable RF compliance level above, BLR-200 should be observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as re-orienting or relocating BLR-200 note 3:

Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3V/m Recommended separation distances table according to IEC 60601-

1-2, 4th edition Recommended separation distances between portable and mobile RF communications equipment and BLR-200 BLR-200 is intended for use in the electromagnetic environment in which radiated RF disturbances are controlled. The customer or user of BLR-200 can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment

(transmitters) and BLR-200 as recommended below, according to the maximum output power of the communication equipment. Rated maximum output power of transmitter in watt Separation distance according to frequency of transmitter in meter 150 kHz to 80 MHz d = 1.17 P 80 MHz to 800 MHz d = 0.35 P 800 MHz to 2500 MHz d = 0.7 P 0.01 0.1 1 10 100 0.12 0.38 1.2 3.7 12 0.12 0.38 1.2 3.8 12 0.070 0.22 0.70 2.2 7.0 For transmitters rated at a maximum output power not listed above, the recommended separation distance d in meters (m) can be estimated using the equation applicable to the frequency of the transmitter, where P is the maximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer. Remark 1:

At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies. Remark 2:

These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from structures, objects and people. BLR-200 is in compliance with the following international standards:

IEC 60601-1:2005+AMD1:2012 IEC 60601-1-2:2014 IEC 60601-1-6:2013 IEC 60601-1-11:2015 ISO 62366-1:2015 IEC 62304:2015 ISO 10993-5:2009 ISO 80601-2-61:2017 IEC 62133:2012 ISO 10993-1:2018 ISO 10993-10:2010 17. TECHNICAL INFORMATION 17.1 Principle Using spectrophotometric methodology, BLR-200 measures oxygen saturation by illuminating the skin and measuring changes in light absorption of oxygenated (oxyhemoglobin) and deoxygenated blood (reduced hemoglobin) using two-wavelengths light: red and infrared. The ratio of absorbance at these wavelengths is calculated and calibrated against direct measurements of arterial oxygen saturation (SaO2) to establish the pulse oximeters measurement of functional oxygen saturation of arterial hemoglobin (SpO2). Also, the sensor should be placed on the palmar side of the proximal phalanx of the index finger and along the radial artery such that the accuracy of the device will be minimally affected by the skin color. Palmar side Radial artery 17.2 Function Specification SpO2 Parameter Accuracy Average 70% - 100%: 2.7%

below 70%: unspecified 8 seconds Data Update Period 8 seconds

% - percentage, unit of SpO2 The graphical plot of all sampled data points:

Please note that certain data tables and plots were obtained from a controlled, induced hypoxia study in healthy adult volunteers. The performance below 80% in one individual gave high positive bias. Further details can be found in the section Testing Summary. Pulse Rate Parameter Measuring range 30 bpm - 250 bpm Resolution 1 bpm Accuracy Average 2.5 bpm or 2% whichever is larger Average over 8 beats bpm - beat per minute, unit of pulse rate Measurement in Low Perfusion SpO2 and pulse rate can be shown correctly when the perfusion index is greater than 0.1%. Resistance to Surrounding Light The deviation between the values measured under the condition of artificial light or indoor natural light and that of darkroom is less than 1%. 17.3 System Specification Safety Type Class II, internally powered, BF type Power Source Internal Battery 3.7V rechargeable lithium battery Charging Voltage & Current DC 5V, 150mA Recording Time of a Fully Charged Battery

~10 hours1,2 Battery Lifetime Charge and discharge no less than 300 times if recharge at least every 3 months 1 Charge the battery as soon as possible when the Ring Status Light turns Solid Red to ensure normal operation. The recording time is estimated on a new battery and it will be reduced as the battery degrades. 2 Based on the assumption that the sensor is emitting at the typical power. A higher power will lead to a reduction in the recording time. Sensor (Wavelength and Power) Red 658nm 2nm, 8.1mW max. Infrared 886nm 6nm, 6.6mW max. The sensor information is especially useful for clinicians performing photodynamic therapy. Data Memory Ring Up to 10 hours of data 1 The memory of the Ring will be automatically cleared after the data has been transferred to the Belun Ring Management. Dimension and Weight Dimension Ring: 44 x 60 x 18mm Weight Ring: approximately 14g 3 The measurement is base on a Ring with a Ring Arm size of 11. Operating Environment Temperature

+10 +38 C Relative Humidity 75%

Atmospheric Pressure 700hPa 1060hPa Expected Service Life The expected service life is 3 years since the first use. 1 Based on the assumption that the device is used to record for 8 hours per day in 80% of days and the battery is recharged at least every 3 months. 17.4 Testing Summary SpO2 accuracy, low perfusion and pulse rate accuracy testing was conducted by Belun Technology Limited as described below. SpO2 Accuracy Testing A SpO2 accuracy comparison was conducted by an independent clinical trial laboratory. The test was conducted in accordance to the US Code of Federal Regulations (CFR) for Non-Significant Risk (NSR) investigational studies, following ISO14155:2011 as appropriate and the pulse oximetry guidelines of ISO 80601-2-

61:2017 application sections, and Pulse Oximeters Premarket Notifications Submissions [510(k)s] Guidance For Industry and Food and Drug Administration Staff (issue: March 4, 2013, US FDA). Healthy, adult, male and female, light- to dark-skinned subjects are recruited. During non-motion and normal operating environment conditions, subjects were in a reclined position and connected to a breathing circuit, for administering medical grade oxygen and nitrogen. The gas flow delivery was adjusted for subject comfort. The gas mixture was controlled to various levels of induced hypoxia resulting in stable oxygen saturation plateaus between 100% and 70% SaO2 Arterial blood samples were drawn during simultaneous data collection from the control pulse oximeter and the test oximeter. The blood was immediately analyzed by Reference CO-Oximetry providing functional SaO2 for the basis of the SpO2 accuracy comparison. The Arms is calculated using weighted data, i.e., if the subject has both right and left sided data, each data will be weighted by 0.5, otherwise the data will be weighted by 1, such that the data is not skewed towards any individuals. During the test, there was an individual who had an increasing high bias in the range below 80% of SaO2 as measured by the Reference CO-Oximeter. During this period the perfusion index decreased. As seen historically with hundreds of hypoxia studies, it is typical for perfusion to decrease along with the lowering of the oxygen saturation level. It is also well established for those experienced in the field of oximetry for the SpO2 values to increase in scatter as the oxygen saturation levels decrease. This is especially observed when the oxygen saturation levels are below 80%. Low Perfusion Testing This test uses a SpO2 functional tester to provide an artificial simulated pulse rate, with adjustable pulse amplitude at different SpO2 levels for the oximeter to read. The oximeter should maintain accuracy in accordance with ISO 80601-2-61:2017 for pulse rate and SpO2 at the lowest obtainable pulse amplitude. Pulse Rate Accuracy Testing This test measures pulse rate oximeter accuracy by compared to reference heart rate provided by a 3-lead ECG monitoring. This test determines whether the oximeter meets the criteria of ISO 80601-2-

61:2017 for pulse rate. Motion Testing This test measures SpO2 and pulse rate oximeter accuracy with

FCC ID LABEL FORMAT AND LOCATION Applicant: Belun Technology Company Limited FCC ID: 2AW6F-BLR200 Location:

Flat/Rm 225B, 2/F, Building 1W, Phase One Hong Kong Science Park, Pak Shek Kok N.T. Hong Kong Telephone : 3706-5640 Fax : 2865-2792 email : info@beluntech.com

SGS North America Inc. 620 Old Peachtree Road SUITE 100 Suwanee, Georgia 30024 United States Applicant Declaration Applicant Legal Business Name Belun Technology Company Limited Address Grantee Code FCC ID Flat/Rm 225B, 2/F, Building 1W, Phase One Hong Kong Science Park, Pak Shek Kok N.T. Hong Kong 2AW6F 2AW6F-BLR200 Authorized Contact Name Kwan Wai To Contact Email Contact Phone belun_reg@beluntech.com

+85237065640 I, the undersigned, certify that I am an authorized signatory for the Applicant and therefore declare;

a) b) in accordance with 47CFR2.911(d), all of the statements herein and the exhibits attached hereto are true and correct to the best of my knowledge and belief. in accepting a Grant of Equipment Authorization issued by a TCB, under the authority of the FCC, as a result of the representations made in this application, the Applicant is responsible for:

labeling the equipment with the exact FCC ID as specified in this application,

(1)

(2) compliance statement labeling pursuant to the applicable rules,

(3) compliance of the equipment with the applicable technical rules, c) d) e) if the Applicant is not the actual manufacturer of the equipment, appropriate arrangements have been made with the manufacturer to ensure that production units of this equipment will continue to comply with the FCCs technical requirements. in accordance with 47 CFR 2.909 and KDB394321, the Applicant has read, understood and agrees to accept that they are the responsible party and agree to abide by their responsibilities as specified under 47 CFR 2.909 and KDB394321. in accordance with ISO 17065, FCC KDB641163, FCC KDB610077, KDB394321 and RSP-100, the Applicant has read, understood, accepts and agrees to abide by the post market surveillance requirements.

(1)

(2)

(3) the Applicant understands, accepts and agrees that a sample may be requested for surveillance testing. the Applicant shall make provisions to always have a production sample available upon request by SGS, FCC and/or ISED. the Applicant shall, upon request by SGS, at the Applicants expense, provide a production sample of the requested product to SGS, FCC and/or ISED as instructed. The sample shall include all support devices, cables, software, accessories or other hardware or software required for evaluation, review, certification and audit surveillance of products certified by SGS. f) g) neither the Applicant nor any party to the application is subject to a 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 because of a conviction for possession or distribution of a controlled substance. See 47CFR 1.2002(b) for the definition of a party for these purposes. the Applicant has read, understood, accepts and agrees to abide by the SGS North America, Inc.(TCB) terms and conditions. Link to CFRs: https://www.fcc.gov/wireless/bureau-divisions/technologies-systems-and-innovation-division/rules-regulations-title-47 Link to KDBs: https://apps.fcc.gov/oetcf/kdb/index.cfm Link to RSP-100: https://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf01130.html Link to the Covered List: Covered List

[Belun Technology Company Limited] (the applicant) certifies that the equipment for which authorization is sought is not covered equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules.

[Belun Technology Company Limited] (the applicant) certifies that, as of the date of the filing of the application, the applicant [is not]

identified on the Covered list, established pursuant to 1.50002, as an entity producing covered equipment. Applicant Signature:

Date: 2023/09/25 Print Name:

Kwan Wai To Title:

Professional Staff

*NOTE: This declaration cannot be signed by an Agent, it shall be signed by an authorized person listed in the FCC database QSF27-14-04 Rev 1.0 Rev. Feb 6, 2023 Page 1 of 1 Original Issue: Jan. 4, 2021

belun Authority to Act as Agent Federal Communication Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MID 21046 Date: November 06, 2023 Regarding: FCC 1D: 2AW6F-BLR200 To Whom It May Concern:

We, the undersigned, hereby authorize SGS-CSTC Standards Technical Services Co., Ltd. to act on our behalf in all manners relating to application for equipment authorization with respect to the FCC ID above, including signing of all documents relating to these matters. Any and all acts carried out by the agent on our behalf shall have the same effect as acts of our own. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). Where our agent signs the application for certification on our behalf, | acknowledge that all responsibility for complying with the terms and conditions for Certification, as specified by SGS North America, Inc., still resides with Belun Technology Company Limited. Agency Agreement Expiration Date: November 06, 2024 Thank you, By: p Kwan Wai To

(Signature) (Print name) On behalf of: Belun Technology Company Limited Telephone: +852-3706-5640 Flat/Rm 225B, 2/F, Building 1W, Phase One Hong Kong Science Park, Pak Shek Kok N.T. Hong Kong Telephone : 3706-5640 Fax : 2865-2792 email : info@beluntech.com

belun Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD Date: November 6, 2023 Subject: Confidentiality Request for FCC ID: 2AW6F-BLR200 To Whom It May Concern, Pursuant to the provisions of the Commission's rules Title 47 Sections 0.457 and 0.459 (47 CFR 0.457, 0.459), Belun Technology Company Limited hereby requests confidential treatment for documents filed with the Commission in connection with the application for equipment authorization referenced above. Permanent Confidentiality Belun Technology Company Limited requests that the Commission withholds the following documents from public viewing indefinitely:

e Block Diagrams e Schematic Diagrams e Operational Descriptions The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. It is our understanding that measurement test reports and FCC ID label format cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, ae Kwan Wai To Belun Technology Company Limited Flat/Rm 225B, 2/F, Building 1W, Phase One Hong Kong Science Park, Pak Shek Kok N.T. Hong Kong Telephone : 3706-5640 Fax : 2865-2792 email : info@beluntech.com

UNITED STATES DESIGNATED AGENT LETTER Date: November 6 2023 TO: Federal Communication Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MID 21046 Applicant U.S. designated agent Company Name: _ Belun Technology Company Company Name: Belun Technology Company Limited 3 FRN: 0029829041 Contact Name: Lap Wai Leung Lydia Grantee Code: 2AW6F Contact Name: Kwan Wai To Address: 438 Petaluma Ave Address: Flat/Rm 225B, 2/F, Building City/Province/Zip: Sebastopol CA 95472 1W, Phase One Hong Kong Science Park, Pak Shek Kok N.T. Hong Kong Telephone: +1 707-696-9140 Telephone: +85237065640 Email: belun_reg@beluntech.com Email: belun_reg@beluntech.com Applicable Equipment: FCC ID: <2AW6F-BLR200 >

ATTN: Director of Certification:

We, < Belun Technology Company Limited> and < Belun Technology Company > understand and acknowledge the applicants consent and the designated agent's obligation to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and e-

mail of the designated agent listed above. We, < Belun Technology Company Limited> and < Belun Technology Company > acknowledge the applicant's acceptance of its obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. Applicant U.S. designated agent Name (Printed): Kwan Wai To Name (Printed): Lap Wai Leung Lydia Title: Professional Staff Title: CEO Signature: ae Signature: