FCC ID: 2ASLFGZHX-B300 Smart Peak Flow Meter

Product user manual Smart Peak Flow Meter Model: B300 Please read this user manual carefully before use. Guangzhou Homesun Medical Technology Co., Ltd Version: B230208 Release date: 2023/02/28 Content 1. Product overview ...................................................................................................................... 2 1.1 Basic information............................................................................................................. 2 1.2 Intended use .................................................................................................................... 2 1.3 Product performance and structure ................................................................................. 2 2. Contraindications ..................................................................................................................... 3 2.1 Absolute contraindications ............................................................................................... 4 2.2 Relative contraindications ................................................................................................ 4 3. Safety precautions ..................................................................................................................... 4 4. Installation and operation ......................................................................................................... 5 4.1 Download APP ................................................................................................................. 6 4.2 Device installation and preparation ................................................................................. 8 4.3 Start test .......................................................................................................................... 8 4.4 Introduction of APP ....................................................................................................... 10 5. Cleaning and disinfection methods .......................................................................................... 13 5.1 Removal steps of flow sensor head ................................................................................. 14 5.2 Cleaning and disinfection of the parts of the flow sensor head ....................................... 14 6. Equipment maintenance ......................................................................................................... 15 6.1 Maintenance .................................................................................................................. 15 6.2 Work, storage and transportation requirements ............................................................ 15 7. Troubleshooting ...................................................................................................................... 16 8. Technical parameters and specification ................................................................................... 17 9. Symbols .................................................................................................................................. 18 10. Product quality information .................................................................................................. 19 10.1 Warranty service .......................................................................................................... 19 10.2 Post-maintenance ......................................................................................................... 19 10.3 Production date and expiry date .................................................................................. 20 11. Electromagnetic compatibility instructions............................................................................ 20 11.1 Parameter description .................................................................................................. 20 11.2 EMC statement ............................................................................................................ 20 11.3 FCC declaration ........................................................................................................... 21 11.4 Declaration of conformity ............................................................................................ 22 12. Contact information .............................................................................................................. 24 1 1. Product overview 1.1 Basic information Product name: Smart Peak Flow Meter Model: B300 FCC ID: 2ASLFGZHX-B300 1.2 Intended use This device is intended to monitor a patients Peak Expiratory Flow (PEF) and Forced Expiratory Volume in one second (FEV1) at home. The device is designed for adults and children over 5 years of age with caregiver supervision. The device is intended for monitoring respiratory conditions such as asthma. The device is for Over-The-Counter Use. 1.3 Product performance and structure 1.3.1Product introduction Smart Peak Flow Meter (Model: B300) is a new type of hand-held pulmonary function testing device that measures your peak expiratory flow (PEF) and forced expiratory volume in 1 second (FEV1). The use of B300 is very simple, you can master it quickly after reading the product user manual. B300 can be used by pediatric (5 years old) and adult patient. The device can store 100 sets of data which can be transmitted to smart phone APP through Bluetooth or LTE transmission mode for permanent storage. You can check the previous measurement records on the smart phone APP. 1.3.2Package content Upon opening the product package, you will find the following contents inside:

Items Smart Peak Flow Meter Mouthpiece USB cable User manual Warranty card Quality certificate 1.3.3Product main structure Quantity 1 1 1 1 1 1 The product is mainly composed of the main unit and removable mouthpiece as shown below:

2 Removable mouthpiece Smart Peak Flow Meter USB cable 1.3.4Measuring parameters Figure 1 Product structure composition PEF PEF%

FEV1 Peak Expiratory Flow (Unit: L/min) PEF real-time measured value / PEF predicted value * 100%

Forced Expiratory Volume in 1 Second (Unit: L) FEV1%

FEV1 real-time measured value / FEV1 predicted value * 100%

1.3.5What do the parameters mean?

PEF%

Severity of FEV1% Obstructive index asthma 80% Normal

< 80% Moderate

< 60%

Severe 80%

Normal

<80%

<50%

<30%

Mild Moderate Severe Note: This measurement result is only an evaluation method, which cannot serve as a standard for disease diagnosis. You should consult your doctor for the meaning and importance of the measured values who will make a diagnosis. If you experience symptoms such as chest distress, short of breath and cough, no matter what the measured value is, please contact your doctor and act according to his/her suggestions. 2. Contraindications 3 2.1 Absolute contraindications 1) Suffered from myocardial infarction, stroke, and shock in the past 3 months;

2) Severe cardiac insufficiency, severe arrhythmia, and unstable angina in the past 4 weeks;

3) Large hemoptysis in the past 4 weeks;

4) Seizures need treatment;

5) Uncontrolled hypertension (systolic blood pressure > 200mmHg, diastolic blood pressure > 100mmHg);

6) Aortic aneurysm;

7) Severe hyperthyroidism. 2.2 Relative contraindications 1) Resting heart rate >120 beats /min;

2) Pneumothorax, giant bullae, and those who are not prepared for surgical treatment;

3) Pregnant women;

4) Tympanic membrane perforation (need to be measured after the affected ear canal is blocked);

5) Respiratory tract infection in the past 4 weeks;

6) People with low immunity and susceptible to infection;

7) Infectious diseases of the respiratory tract (such as tuberculosis, influenza, etc.);

8) Children with critical illnesses and children with blood oxygen saturation lower than 92% require oxygen therapy. The contraindications for the operation and use of the equipment include but are not limited to the above symptoms. 3. Safety precautions As a medical device manufacturer, our company is dedicated to ensuring the safety, reliability and performance of the device. To use the device correctly, please read and follow the precautions below and keep this user manual in a convenient place for reference at any time. Warning In order to reduce cross infection, it is recommended that customers purchase general accessories detachable mouthpiece for smart peak flow meter. Please use within the temperature, humidity and atmospheric pressure range specified by the manufacturer, otherwise the equipment may not reach the claimed performance. Please operate strictly according to this user manual, or else there might be inaccurate measurements or device gets damaged. 4 Please clean and disinfect the pressure taking structure according to the method specified in the product manual. Please connect the device to the designated device, otherwise the device will be unusable or the measurement data will be wrong. Please test according to the method specified in the product manual, and confirm that the current measurement mode and the blowing method are correctly matched, otherwise the measurement results will be inaccurate. Do not use this device in an environment that has anesthetics and other inflammables which may cause an explosion. Do not use this device in strong electromagnetic interference or direct wind source, and heat source environment. Do not spatter liquid onto this device which may cause damage. Do not place the equipment in a mechanically vibrating environment. Do not drop this device from a high place. Do not use sharp objects to press or scratch the equipment shell. Do not disassemble the device without permission. No part of the medical device may be replaced by the customer. Use only Homesun approved accessories and spare parts for this medical device. Keep accessories, packing material, cleaning and disinfection substances out of the reach of children. Do not place heavy objects on the device which may cause performance or mechanical damage. Do not use high temperature, high pressure or gas disinfection to disinfect the device. If the device continues to fail to display data or there are other abnormal conditions, press function button to remeasure, or power off the device and restart; please contact the after-sales customer service in time. After use, the device will produce some wastes such as disposable parts or vulnerable parts and when discarding the equipment itself. Disposing of these wastes arbitrarily will pollute the environment or cause cross-infection. It should be dealt with per laws, regulations and other relevant regulations. The measurement results can only serve as a clinical reference which should be explained by professional medical personnel. A qualified physician must reassess all measurements. An interpretation by the medical device is significant only when considered together with other clinical findings. When using the device, pay special attention to the user manual where this symbol is marked. 4. Installation and operation When you use B300 for the first time, you should bond APP and input personal health 5 information. 4.1 Download APP

(1) Scan the QR code ,or search name breathhome from App Store or Google Play Store to download and install the APP. Note: This APP is supported by smart phone (all versions of iOS or Android 4.4-11 platform).

(2) Open the APP, register by email to create a new account, enter the APP HOME after registration. 6

(3) Click Health Profile to complete personal information input and change.

(4) Connect the device. Power on the device and place it near the smart phone, activate the bluetooth mode of the smart phone, click Manage Device, complete device bonding according to operation instruction. If the device is not connected, you will hear Device 7 not bond. 4.2 Device installation and preparation Put the round end of the detachable mouthpiece into the flow sensor head, then connect the flow sensor head to the breathing hole of the Smart Peak Flow Meter, applying a little pressure so that the flow sensor head is tightly attached to the breathing hole of the device. 4.3 Start test

(1) Hold the product upright in the hand, long press the function button to start up, you will hear Welcome to breath home. 8 Function button

(2) Stand up.

(3) Short press function button, you will hear Please blow .

(4) Take a deep breath, hold your breath while put the mouthpiece into your mouth (the upper and lower teeth should nibble the front of the mouthpiece, and your lips should tightly cover the mouthpiece). Exhale quickly and forcefully, taking as much time as possible (the standard time is 6 seconds). While blowing, you will hear Come on, come on, 3, 2, 1, stop. When blowing is not correct, you will hear Please blow again. Note:

In order to ensure the accuracy of measurement results, users are required to understand and master the blowing method of each measurement mode. Keep the standing posture during the test and keep your body stable. Do not shake your head downward with your body violently while blowing, since this may affect test result.

(5) After the test, there is a prompt tone, you will hear Your peak flow is XXX litres per minute, the results is shown in display screen (you can test multiple times and take the maximum value). Or you can check the results on the RECORD page of APP. 9 Note: The data in the display screen will switch every 3 seconds.

(6) When test is completed, long press function button to power off; when theres no operation conducted to the device, it will automatically power off after 6 minutes, you will hear Device shutting down. 4.4 Introduction of APP Log into the APP, it has the following functions:

1HOME Click HOMEthe following items will appear:

10 No Item Function 1 2 3 4 Manage Device Check device information, bind or unbind the device to APP. Health Profile Fill in, modify or check personal information. Fill in questionnaire, APP will conduct an assessment Health Assessment to your asthma control results based on the answers in the questionnaire. Record and check the daily Peak flow rate, Health Log Medication records (Manually choose) and Records 5 Standard test of symptoms (Manually choose). Open this page while blowing, it will display the blowing curve and measured values, and make a judgment on whether the blowing manner meets standard. 2RECORD Display the historical records of measurement results:

11 3REPORT Record the best measurement results of Today, 1 Week, 2 Weeks, 4 Weeks and generate a line chart. It also has functions of Index Analysis and Create Report. 12 4USER No Item Function 1 2 3 4 Health Profile Fill in, modify or check personal information. Manage Device Check for new version

(v.1.0.0) Log Out Check device information, bind or unbind the device to APP. Check the current version of APP. Log out 5. Cleaning and disinfection methods During the pulmonary function test, some parts of the equipment will be contaminated with bacteria. Therefore, the next subject may be at risk of bacterial infection. Thorough disinfection of all contaminated parts can avoid potential risks of infection. Therefore, all parts should be disinfected regularly. See the table below. Disposable pulmonary function mouthpiece Discarded immediately after use in each patient Special reminder: Disposable products must be discarded. 13 The following parts must be cleaned and disinfected once a day, see the following table Flow sensor head is cleaned and disinfected once a day Caution:

Thorough disinfection of all contaminated parts can avoid potential risks of infection. Therefore, all parts should be disinfected regularly, and disposable products must be discarded!

5.1 Removal steps of flow sensor head Press the button on the back of the devicerotate the flow sensor head and pull it out forcefully at the same time 5.2 Cleaning and disinfection of the parts of the flow sensor head 1) Cleaning and disinfection of the parts of the flow sensor head and the screen under normal temperature and pressure:

Pre-rinse with running distilled water immediately after use to remove residual saliva, dirt and other stains. Soak all the cleaned sensor head parts in 2% glutaraldehyde disinfectant solution for about 15 minutes, and add 0.3% sodium bicarbonate to enhance its sterilization and disinfection effect. If there are dirt deposits, do not use hard objects directly scraping, but should increase the soaking time and disinfectant concentration. After disinfection, rinse all parts with a large amount of distilled water and place them in a clean place to dry thoroughly. It is recommended that all patients be cleaned and disinfected after the test on the same day, so that they can be dried naturally and used next time. 2) Cleaning and disinfection of the main body:

Use clean gauze dipped in the appropriate amount of 75% medical alcohol (the gauze does not drip), and wipe the outside of the fuselage;

Wait for natural air drying or use clean dry gauze to wipe dry. 3) Assemble and restore the disassembled parts according to their original positions. Caution:

cleaning and disinfecting the equipment, it is forbidden to immerse the main body in liquid!

Do not use cloth, paper, or hard objects to clean the screen, if necessary, use the 14 special brush provided by the company for cleaning!

Warning:

Failure to follow the steps of the cleaning and disinfection methods mentioned above may result in cross-infection. Caution After cleaning and disinfecting and before starting to use the equipment, complete the capacity calibration and 3 flow verification of the equipment in accordance with the description of the calibration in the APP. 6. Equipment maintenance 6.1 Maintenance 1) Regular inspections to ensure that the equipment has no obvious damage that affects safety or detection performance. It is recommended to inspect at least once a week. If there is obvious damage, stop using the equipment and contact after-sales customer service. 2) The maintenance of this equipment is limited to qualified personnel designated by the manufacturer. Users should not repair the equipment by themselves. 3) When the device prompts that the battery is low, use a power source that meets the USB specification to charge in time. If the battery is found to be used for too short a time, you should stop using the device and contact after-sales customer service. 4) Please use it in the specified working environment, keep the operating environment clean, free of corrosive or combustible substances, and free of excessively high or low temperature and humidity. 6.2 Work, storage and transportation requirements 6.2.1 Working environment The device needs to work under the following environmental conditions:

Temperature:10+40, Humidity: 0RH80RH, Atmospheric pressure: 70KPa 106KPa If it exceeds the above working environment, it will affect the measurement performance of the product. 6.2.2 Transport and storage environment The device should be transported and stored under the following environmental conditions:

Temperature:-20 +55, Humidity: 0RH80RH, Atmospheric pressure:

70KPa 106KPa 15 Clean room without corrosive gas and well ventilated. 6.2.3 Transportation requirements The following requirements must be met when transporting the device:

1) Avoid heavy objects squeezed;

2) Avoid direct sunlight;

3) Avoid getting wet from the rain;

4) Handle with care during the moving process. 7. Troubleshooting Failure phenomenon Cause Analysis Solution Can not boot Low battery Possible equipment damage Please connect the charger to charge. Please contact the after-sales customer service center. The LTE network connection fails after the device is powered on There is no LTE network signal in the use area or the network signal is weak Please move to the LTE network signal strong location to use the device The LTE communication module may be damaged Please contact the customer service center The Bluetooth function of the mobile phone is not turned on Please turn on the Bluetooth function of the mobile phone. Bluetooth network connection failed after power on The distance between the device and the phone is too large Please keep the distance between other Bluetooth and the device less than 5 meters. The Bluetooth communication module may be damaged Please contact the after-sales customer service center. There is a strong electromagnetic interference around Please use this product under electromagnetic compatibility conditions as specified in the product manual The instrument does not enter the detection state Press the key again to measure or shut down and restart. The device successfully connects to the network but fails to upload data No data can be detected for blowing Incorrect blowing posture The flight time after charging is too short Battery is damaged Data lost

(software) data lost Please use the correct blowing method. Please contact the after-sales customer service center. You can find the information under the backup in the software catalog or use the data recovery function of the system to find the lost data. 16 Software crashes During use, the logic of the application itself may be wrong, and the system may cause the software to crash. At this time, the software can be restarted to continue running. 8. Technical parameters and specification Basic unit specifications Dimensions Weight Power supply Input power Working electricity Maximum battery life with one full charge Maximum stand-by time with one full charge Display Sensor type Transmission mode Safety category Service life Measurement parameters Measurement parameters Memory size Measuring range of PEF Measuring range of FEV1 Accuracy Measuring resolution Environmental conditions Working environment Storage environment 1204452mm 85g 3.7V-500mAh, rechargeable Lithium polymer battery 5VA 100mA 6 days 30 days 1.44'' TFT LCD display Pressure sensor Bluetooth, LTE Cat M, LTE Cat NB BF type 5 years PEF/FEV1 100 30-840L/min 0.01-9.99L PEF: 10% or 10L/min (Take the larger one) FEV1: 3% or 0.05L (Take the larger one) Meet ATS 2005 Revision accuracy requirement. PEF: 1L/min FEV1: 0.01L Temperature:10+40, Humidity: 0RH80RH, Atmospheric pressure: 70KPa 106KPa Temperature:-20+55, Humidity: 0RH80RH, Atmospheric pressure:70KPa 106KPa 17 About the bluetooth Support Bluetooth type:

Type of Modulation Channel Bandwidth About the LTE Support LTE type:

Operation Band Bluetooth-LE GFSK 2 MHz Cat M, Cat NB 2, 4, 12, 13, 66 9. Symbols Graphics Symbols Meaning Refer to the instruction manual / booklet Keep away from rain Keep away from sunlight Fragile, handle with care Temperature limit Humidity limitation Atmospheric pressure limitation Stacking limit by 5 Type BF applied part 18 Low-frequency electromagnetic radiation WEEE (Waste Electrical and Electronic Equipment). The waste products should be handled legally. Caution Serial number Manufacturer Class II equipment Recyclable Unique device identifier Dustproof waterproof level. It can prevent solid object larger IP22 than12mm from intruding, and when tilt for 15 degrees, it can still prevent water from intruding, so no harmful effect will be created. 10. Product quality information 10.1 Warranty service From the date of purchase, the product enjoys a free warranty within one year with the purchase invoice, but does not include the following failures caused by the user's personal reasons. Such as unauthorized disassembly and assembly, malfunctions caused by product modification, malfunctions caused by accidental drops during handling, malfunctions caused by lack of reasonable maintenance, malfunctions caused by force majeure factors such as natural disasters. The manufacturer does not assume any responsibility for problems caused by incorrect operation or use with other equipment or accessories. 10.2 Post-maintenance If you need to apply for warranty and repair services, please contact after-sales customer 19 service, fill in the warranty card, and take this product to a professional service point for repair. If the product is repaired by the user or by a non-designated repair center, the warranty statement is invalid. If the equipment needs maintenance, the above requirements also apply. In order to process your repair application more quickly, please provide the following product information:

1) Product number. 2) Detailed description of the fault. warning:

For safety reasons, maintenance center personnel have the right to reject products that have been contaminated. Products should be packaged in non-polluting packaging. Caution:

Please choose appropriate and strong packaging when sending it for repair (original packaging is best). The manufacturer has the right to return the contaminated product to the shipper 10.3 Production date and expiry date Product production date: see product label Product expiration date: three years 11. Electromagnetic compatibility instructions 11.1 Parameter description Serial number name Cable length ( m ) Whether to block Remark 1 USB Cable 1.0 Yes

Warning Even if other equipment meets the emission requirements of the corresponding national standards, the equipment or system may still be interfered by other equipment. 11.2 EMC statement 1 Model B300 needs special precautions regarding EMC and needs to be installed and put into service according to the EMC information provided in the accompanying document;

2 Portable and mobile RF communications equipment can affect model B300. 20 Warning:

1 Dont be near active HF surgical equipment and the RF shielded room of an ME system for magnetic resonance imaging, where the intensity of EM disturbances is high. 2 Use of accessories, transducers and cables other than those specified or provided by the manufacturer of Model B300 could result in increased electromagnetic emissions or decreased electromagnetic immunity of this equipment and result in improper operation. 3 Use of Model B300 adjacent to or stacked with other equipment should be avoided because it could result in improper operation. If such use is necessary, this equipment and the other equipment should be observed to verify that they are operating normally. 11.3 FCC declaration 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. FCC Caution:

Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This radio is designed for and classified as General population/uncontrolled Use, the guidelines are based on standards that were developed by independent scientific organizations through periodic and thorough evaluation of scientific studies. The standards include a substantial safety margin designed to assure the safety of all persons regardless of age or health. The device complies with RF specifications when the device used at 15mm from your front face and 0mm from your limbs. Note: This equipment 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 equipment 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 equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment 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 separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 21 Consult the dealer or an experienced radio/TV technician for help. 11.4 Declaration of conformity Guidance and manufacturers declaration - electromagnetic emissions Table 1 Emissions test RF emissions CISPR 11 RF emissions CISPR 11 Harmonic emissions IEC 61000-3-2 Voltage fluctuations/ flicker emissions IEC 61000-3-3 Table 2 Compliance Group 1 Class [B]

Class A Comply Guidance and manufacturers declaration - electromagnetic Immunity Immunity Test Electrostatic discharge

(ESD) IEC 61000-4-2 Electrical fast transient/burst IEC 61000-4-4 Surge IEC 61000-4-5 IEC 60601-1-2 Test level Compliance level 8 kV contact 2 kV, 4 kV, 8 kV, 15 kV air 8 kV contact 2 kV, 4 kV, 8 kV, 15 kV air 2 kV for power supply lines 1 kV signal input/output 100 kHz repetition frequency 2 kV for power supply lines N/A 100 kHz repetition frequency 0.5 kV, 1 kV differential mode 0.5 kV, 1 kV, 2 kV common mode 0.5 kV, 1 kV differential mode N/A Voltage dips, short interruptions and voltage variations on power supply input lines IEC 61000-4-11 0 % UT; 0,5 cycle. At 0, 45, 90, 135, 180, 225, 270 and 315. 0 % UT; 1 cycle and 70 % UT; 25/30 cycles; Single phase: at 0. 0 % UT; 250/300 cycle 0 % UT; 0,5 cycle. At 0, 45, 90, 135, 180, 225, 270 and 315. 0 % UT; 1 cycle and 70 % UT;

25/30 cycles; Single phase: at 0. 0 % UT; 250/300 cycle Power frequency magnetic field IEC 61000-4-8 Conduced RF IEC61000-4-6 30 A/m 50Hz/60Hz 30 A/m 50Hz/60Hz 3 V 0,15 MHz 80 MHz 6 V in ISM and amateur radio bands between 0,15 MHz and 80 MHz 80 % AM at 1 kHz 3 V 0,15 MHz 80 MHz 6 V in ISM and amateur radio bands between 0,15 MHz and 80 MHz 80 % AM at 1 kHz Radiated RF IEC61000-4-3 10 V/m 80 MHz 2,7 GHz 10 V/m 80 MHz 2,7 GHz 22 80 % AM at 1 kHz 80 % AM at 1 kHz NOTE UT is the a.c. mians voltage prior to application of the test level. Table 3 Radiated RF IEC61000-4-3

(Test specifications for ENCLOSURE PORT IMMUNITY to RF wireless communication s equipment) Guidance and manufacturers declaration - electromagnetic Immunity Test Frequency

(MHz) Band

(MHz) Service Modulation Modulation

(W) Distance

(m) IMMUNI TY TEST LEVEL

(V/m) 1,8 0.3 27 2 0.3 28 0,2 0.3 9 2 0.3 28 2 0.3 28 385 380 390 450 430 470 704 787 800 960 710 745 780 810 870 930 1 700 1 990 1720 1845 1970 Pulse modulation 18 Hz FM 5 kHz deviation 1 kHz sine Pulse modulation 217 Hz Pulse modulation 18 Hz Pulse modulation 217 Hz TETRA 400 GMRS 460, FRS 460 LTE Band 13, 17 GSM 800/900, TETRA 800, iDEN 820, CDMA 850, LTE Band 5 GSM 1800;

CDMA 1900;

GSM 1900;

DECT;

LTE Band 1, 3, 4, 25;

UMTS 2450 2 400 2 570 Bluetooth, WLAN, Pulse modulation 2 0.3 28 23 802.11 b/g/n, RFID 2450, LTE Band 7 WLAN 802.11 a/n 217 Hz Pulse modulation 217 Hz 5 100 5 800 5240 5500 5785 0,2 0.3 9 12. Contact information Manufacturer: Guangzhou Homesun Medical Technology Co., Ltd Address: Floor 7th, TianxiangBusiness Building, No.28, Li Fu Road, Haizhu District, Guangzhou,GD .China Tel.: 400-030-1510 Email: service@huxijia.cn URL: https://www.huxijia.cn/index_english.html 24

Smart Peak Flow Meter Model:B300 Internal Battery:3.7V DC Input:5V 1A 500mAh Guangzhou Homesun Medical Technology Co., Ltd Floor 7th, TianxiangBusiness Building, No.28, Li Fu Road, Haizhu District, Guangzhou, GD.China FCC ID: 2ASLFGZHX-B300 B323023024

2023-07-07 Nemko Canada Inc 303 River Road Ottawa, Ontario, Canada K1V 1H2 Attn: Director of Certification Authority to Act as Agent On our behalf, | appoint Shenzhen Huatongwei International Inspection Co. Ltd./ 1/F, Bldg 3, Hongfa Hi-tech Industrial Park, Genyu Road, Tianliao Shenzhen, China / Hans Hu.. to act as our agent in the preparation of this application for equipment certification. | certify that submitted documents properly describe the device or system for which equipment certification is sought. | also certify that each unit manufactured, imported or marketed, as defined in the Federal Communications Commissions regulations will have affixed to it a label identical to that submitted for approval with this application. For instances where our authorized 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 Nemko Canada Inc, still resides with Guangzhou Homesun Medical Technology Co., Ltd / Floor 7th, TianxiangBusiness Building, No.28, Li Fu Road, Haizhu District, Guangzhou,GD .China Agency agreement expiration date: 2024-07-06 Adain Zhao Adam Zhao Signature Printed On behalf of : Guangzhou Homesun Medical Technology Co., Ltd Telephone: 13660537279

2023-07-07 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2ASLFGZHX-B300 Product Name: Smart Peak Flow Meter Request for Confidentialit Pursuant to Sections 0.457 and 0.459 of the commissions rules, we hereby request that the following documents be held confidential:

e Schematics e Block diagram e Operation description e These materials contain trade secrets and proprietary information and are not customarily released to the pub! The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors.

*y Adlon Zhao Adam Zhao Signature Printed On behalf of : Guangzhou Homesun Medical Technology Co., Ltd Telephone: 13660537279

Guangzhou Homesun Medical Technology Co., Ltd Covered Equipment Certification Attestation Letter 71712023 Nemko North America, Inc. 303 River Road Ottawa K1V 1H2 Canada ATTN.: Reviewing Engineer FCC ID: 2ASLFGZHX-B300

(Guangzhou Homesun Medical Technology Co., Ltd ) 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. Note: If the equipment for which the applicant seeks authorization is produced by any of the entities identified on the current Covered List, the applicant should include an explanation on why the equipment is not covered equipment.

(Guangzhou Homesun Medical Technology Co., Ltd) certifies that, as of the date of the ng of the application, the applicant is not identified on the Covered List as an entity producing covered equipment. Signed: Adan Dhow Printed name: Adam Zhao Title: Manager Company Name: Guangzhou Homesun Medical Technology Co., Ltd Date: 7/7/2023

Guangzhou Homesun Medical Technology Co., Ltd U.S. Agent Designation Certification for Service

Attestation Letter of Process July 11, 2023 Nemko North America, Inc. 303 River Road Ottawa K1V 1H2 Canada ATTN.: Reviewing Engineer FCC ID: 2ASLFGZHX-B300 FRN: 0028273555 Per section Ltd ") certifies following 2.911 (d)(7) of the FCC rules, that the equipment for which authorization

(" Guangzhou Homesun Medical is sought is designated Technology to the Co., U.S. Designated agent* for service of process:

U.S. Company Address:

Company Name:

Physical Agent name:

Agent Email Address:

FRN:

Product Services Global 328 W Palm Ave, Monrovia. ChiS.Chan cschanm@gm 0033406703 ail.com CA91016

& Consultation LLC The above contact person accepts the obligation for service of process. accepts The applicant terminated proceeding involving the equipment. to maintain an agent for no less than one year after the grantee has all marketing and importation or the conclusion of any Commission-related Applicant Signed:

Signed:

Designated

(Required, Agent Signed:

if different to Applicant):

Signed jj;L A/-;

Printed name:Adam Zhao Title: Manager Company Guangzhou Homesun Name: Medical Technology Co., name:ChiS.Chan Printed Title:

Company

Name: Consultation Global Product LLC Services Technical Director Date:

Ltd June 2, 2023 Date:

2023-07-07 SC3077412

the applicant applicant's agent entity. An applicant must designate a contact of process, in the United for service located in the United States of whether of acting as the is a domestic or foreign may designate itself as the agent for service of process. regardless States the applicant for purposes located