2BOUN-HZ-WS-03Water Sensor

Local Representative Letter For Certification Service in the USA Federal Communications Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21048 To whom it may concern Pursuant to Section 2.911(d)(7), of the Commission’s Rules (47 C.F.R.) we attest as follows for the product listed below: FCC IDModel name 2BOUN-HZ-WS-03HZ-WS-03, ZG-226Z We hereby acknowledge as follows: i.both signees confirm that the point of contact accepts responsibility to act as a US- American Representative on behalf of the applicant ii.the point of contact provides the physical U.S. address and email as listed below iii.both parties maintain the requirements of this agreement for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. iv.An expiration date for this letter does not exist. In case the U.S. agent changes, the grantee is obligated to notify the FCC within 30 days via the granting TCB. US-American Point of ContactApplicant/Approval Holder Signature Date: 2026/5/20 Signature Date:2026/5/20 Company Name:GLOCERTS TECHNOLOGY INCSHENZHEN HAI HAO ELECTRONIC CO.,LTD FRN:00363397370036932531 Contact Name:Huiying FanHarrison Xu Address:19784 SUNKISSED RIDGE DR, RIVERSIDE, CA 92507 507B,Building A,Zhi Hui Chuang Xin Zhong Xin,Qian jin 2 lu,Xixiang Street,BaoAn District,Shenzhen, China Phone:(626) 588-8039+86-15889762841 Email:[email protected]@qq.com

Page 1 of 3 FCC ID: 2BOUN-HZ-WS-03 External photos Page 2 of 3 FCC ID: 2BOUN-HZ-WS-03 Page 3 of 3 FCC ID: 2BOUN-HZ-WS-03

Label 1. The label is silk-screen on the sample FCC ID:2BOUN-HZ-WS-03

Page 1 of 2 FCC ID: 2BOUN-HZ-WS-03 Internal photos Page 2 of 2 FCC ID: 2BOUN-HZ-WS-03 Zigbee ANT

Page 1 of 7 Report No.: AiTSZ-260429107FW2 Note: This device has been tested and found to comply with the standard(s) listed, this test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. This report shall not be reproduced except in full, without the written approval of Guangdong Asia Hongke Test Technology Limited. If there is a need to alter or revise this document, the right belongs to Guangdong Asia Hongke Test Technology Limited, and it should give a prior written notice of the revision document. This test report must not be used by the client to claim product endorsement. Guangdong Asia Hongke Test Technology Limited B1/F, Building 11, Junfeng Industrial Park, Chongqing Road, Heping Community, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China. RF Exposure evaluation Product Name : Water Sensor Brand Name : Haozee Model : HZ-WS-03 Series Model : ZG-226Z FCC ID : 2BOUN-HZ-WS-03 Applicant : SHENZHEN HAI HAO ELECTRONIC CO.,LTD Address : 507B,Building A,Zhi Hui Chuang Xin Zhong Xin,Qian jin 2 lu,Xixiang Street,BaoAn District,Shenzhen, China Manufacturer : SHENZHEN HAI HAO ELECTRONIC CO.,LTD Address : 507B,Building A,Zhi Hui Chuang Xin Zhong Xin,Qian jin 2 lu,Xixiang Street,BaoAn District,Shenzhen, China Standard(s) : 47CFR §1.1310, 47CFR §2.1093 KDB447498 D01 General RF Exposure Guidance v06 Date of Receipt : Apr. 29, 2026 Date of Test : Apr. 30, 2026~ May 17, 2026 Issued Date : May 18, 2026 Issued By: Guangdong Asia Hongke Test Technology Limited B1/F, Building 11, Junfeng Industrial Park, Chongqing Road, Heping Community, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China Tel.: +86 0755-230967639 Fax.: +86 0755-230967639 Reviewed by: Approved by: Aalen.Ye Allen Wang Page 2 of 7 Report No.: AiTSZ-260429107FW2 Report Revise Record Report Version Issued Date Notes M0 May 18, 2026 Initial Release Page 3 of 7 Report No.: AiTSZ-260429107FW2 Contents 1 GENERAL INFORMATION .......................................................................................................................................... 4 1.1 ENVIRONMENTAL CONDITIONS ........................................................................................................................................ 4 1.2 GENERAL DESCRIPTION OF EUT ...................................................................................................................................... 4 1.3 TEST FACILITY .............................................................................................................................................................. 5 1.4 MEASUREMENT UNCERTAINTY ........................................................................................................................................ 5 2 METHOD OF MEASUREMENT ................................................................................................................................... 6 2.1 APPLICABLE STANDARD.................................................................................................................................................. 6 2.2 EVALUATION METHOD AND LIMIT .................................................................................................................................... 6 2.3 MANUFACTURING TOLERANCE ........................................................................................................................................ 7 2.4 EVALUATION RESULT ..................................................................................................................................................... 7 2.5 CONCLUSION ............................................................................................................................................................... 7 Page 4 of 7 Report No.: AiTSZ-260429107FW2 1 GENERAL INFORMATION 1.1 Environmental conditions During the measurement the environmental conditions were within the listed ranges: Normal Temperature: 25°C Relative Humidity: 55 % Air Pressure: 101 kPa 1.2 General Description of EUT Product Name: Water Sensor Model/Type reference: HZ-WS-03 Serial Model: ZG-226Z Model difference: All models are same as the samples except model name, all the models are electrical identical same mechanical structure and design. Power Supply: DC 3.0V from battery Hardware Version: N/A Software Version: N/A Sample(s) Status: AiTSZ-260429107-1(Normal sample) AiTSZ-260429107-2(Engineer sample) Zigbee: Modulation: OQPSK (DSSS) Operation frequency: 2405MHz ~ 2480MHz Channel number: 16 Channel separation: 5MHz Antenna type: PCB Antenna Antenna gain: 1.90dBi Remark: The above DUT's information was declared by manufacturer. For more detailed features description, please refer to the manufacturer’s specifications or the User's Manual.. Page 5 of 7 Report No.: AiTSZ-260429107FW2 1.3 Test Facility Test Laboratory: Guangdong Asia Hongke Test Technology Limited B1/F, Building 11, Junfeng Industrial Park, Chongqing Road, Heping Community, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China The test facility is recognized, certified or accredited by the following organizations: FCC-Registration No.: 251906 Designation Number: CN1376 Guangdong Asia Hongke Test Technology Limited has been registered and fully described in a report filed with the (FCC) Federal Communications Commission. The acceptance letter from the FCC is maintained in our files. IC —Registration No.: 31737 CAB identifier: CN0165 The 3m Semi-anechoic chamber of Guangdong Asia Hongke Test Technology Limited has been registered by Certification and Engineering Bureau of Industry Canada for radio equipment testing with Registration No.: 31737 A2LA-Lab Cert. No.: 7133.01 Guangdong Asia Hongke Test Technology Limited has been accredited by A2LA for technical competence in the field of electrical testing, and proved to be in compliance with ISO/IEC 17025: 2017 General Require…

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Page 1 of 28 Report No.: AiTSZ-260429107FW1 Note: This device has been tested and found to comply with the standard(s) listed, this test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. This report shall not be reproduced except in full, without the written approval of Guangdong Asia Hongke Test Technology Limited. If there is a need to alter or revise this document, the right belongs to Guangdong Asia Hongke Test Technology Limited, and it should give a prior written notice of the revision document. This test report must not be used by the client to claim product endorsement. Guangdong Asia Hongke Test Technology Limited B1/F, Building 11, Junfeng Industrial Park, Chongqing Road, Heping Community, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China. TEST REPORT Product Name : Water Sensor Brand Name : Haozee Model : HZ-WS-03 Series Model : ZG-226Z FCC ID : 2BOUN-HZ-WS-03 Applicant : SHENZHEN HAI HAO ELECTRONIC CO.,LTD Address : 507B,Building A,Zhi Hui Chuang Xin Zhong Xin,Qian jin 2 lu,Xixiang Street,BaoAn District,Shenzhen, China Manufacturer : SHENZHEN HAI HAO ELECTRONIC CO.,LTD Address : 507B,Building A,Zhi Hui Chuang Xin Zhong Xin,Qian jin 2 lu,Xixiang Street,BaoAn District,Shenzhen, China Standard(s) : FCC CFR Title 47 Part 15 Subpart C Section 15.247 Date of Receipt : Apr. 29, 2026 Date of Test : Apr. 30, 2026~ May 17, 2026 Issued Date : May 18, 2026 Issued By: Guangdong Asia Hongke Test Technology Limited B1/F, Building 11, Junfeng Industrial Park, Chongqing Road, Heping Community, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China Tel.: +86 0755-230967639 Fax.: +86 0755-230967639 Reviewed by: Approved by: Aalen.Ye Allen Wang Page 2 of 28 Report No.: AiTSZ-260429107FW1 Report Revise Record Report Version Issued Date Notes M0 May 18, 2026 Initial Release Page 3 of 28 Report No.: AiTSZ-260429107FW1 Contents 1 TEST SUMMARY ....................................................................................................................................................... 4 1.1 TEST STANDARDS ......................................................................................................................................................... 4 1.2 TEST SUMMARY ........................................................................................................................................................... 4 1.3 TEST FACILITY .............................................................................................................................................................. 5 1.4 MEASUREMENT UNCERTAINTY ........................................................................................................................................ 5 2 GENERAL INFORMATION .......................................................................................................................................... 6 2.1 ENVIRONMENTAL CONDITIONS ........................................................................................................................................ 6 2.2 GENERAL DESCRIPTION OF EUT ...................................................................................................................................... 6 2.3 DESCRIPTION OF TEST MODES AND TEST FREQUENCY .......................................................................................................... 7 2.4 SPECIAL ACCESSORIES ................................................................................................................................................... 7 2.5 EQUIPMENT LIST FOR THE TEST ....................................................................................................................................... 7 3 TEST CONDITIONS AND RESULTS .............................................................................................................................. 9 3.1 CONDUCTED EMISSIONS TEST ......................................................................................................................................... 9 3.2 RADIATED EMISSIONS AND BAND EDGE .......................................................................................................................... 11 3.3 MAXIMUM PEAK CONDUCTED OUTPUT POWER ............................................................................................................... 19 3.4 POWER SPECTRAL DENSITY .......................................................................................................................................... 20 3.5 6DB BANDWIDTH ....................................................................................................................................................... 21 3.6 OUT-OF-BAND EMISSIONS ........................................................................................................................................... 22 3.7 ANTENNA REQUIREMENT ............................................................................................................................................. 23 4 TEST SETUP PHOTOGRAPHS OF EUT ....................................................................................................................... 24 5 PHOTOS OF EUT ..................................................................................................................................................... 25 Page 4 of 28 Report No.: AiTSZ-260429107FW1 1 TEST SUMMARY 1.1 Test Standards The tests were performed according to following standards: FCC Rules Part 15.247: Frequency Hopping, Direct Spread Spectrum and Hybrid Systems that are in operation within the bands of 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz ANSI C63.10: 2020: American National Standard for Testing Unlicensed Wireless Devices KDB558074 D01 15.247 Meas Guidance v05r02: Guidance for Compliance Measurements on Digital Transmission System, Frequen…

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Productspecification QuickReferenceDate Antennamoduleonthesystemboard FrequencRange 2400~2500GHz Ant.PortInputPwr.(dBm) 0(Typ.Zigbeeclass2outputpower) Tot.Rad.Pwr.(dBm) -1.2(Inputpwr–losspwr) PeakEIRP(dBm)1.2 Directivity(dBi) 1(alldirectionantenna) Efficiency(dB)60.2% Gain(dBi) 1.9 MaximumPower(dBm) 1.7(XY-plane) MinimumPower(dBm) -4(XY-plane) Avg.Power(dBm) -0.5(XY-plane) InputImpendence(ohm) 50 PolarizationType Vertical&Horizontal V.S.W.R <1.4 Allthetechnicaldataandinformationcontainedhereinaresubjecttochangewithoutpriornotice AntennaLayout&moduleonthesystemboard AntennaGain GainTable [email protected] Efficiency Peak Avg. Peak Avg. Peak Avg. ModuleBoard 1.2-0.51.9-3.61.1-3.060.2% Manufacturer:SHENZHEN HAI HAO ELECTRONIC CO.,LTD 507B,Building A,Zhi Hui Chuang Xin Zhong Xin,Qian jin 2 lu,Xixiang Street,BaoAn District,Shenzhen, China ReturnLoss TheEnvironmentofAntennaRadiationPattern 3Dradiationpatterndiagram XY-plane YZ-planeXZ-plane

Page 1 of 21 Report No.: AiTSZ-260429107FW1 Appendix RF test data for Zigbee Page 2 of 21 Report No.: AiTSZ-260429107FW1 1. Duty Cycle 1.1 Test Result 1.1.1 Ant1 Ant1 Mode TX Type Frequency (MHz) T_on (ms) Period (ms) Duty Cycle (%) Duty Cycle Correction Factor (dB) Max. DC Variation (%) Zigbee SISO 2405 100.000 100.000 100.00 0.00 0.00 2440 100.000 100.000 100.00 0.00 0.00 2480 100.000 100.000 100.00 0.00 0.00 Page 3 of 21 Report No.: AiTSZ-260429107FW1 1.2 Test Graph 1.2.1 Ant1 Zigbee_LCH_2405MHz_Ant1_NTNV Zigbee_MCH_2440MHz_Ant1_NTNV Page 4 of 21 Report No.: AiTSZ-260429107FW1 Zigbee_HCH_2480MHz_Ant1_NTNV Page 5 of 21 Report No.: AiTSZ-260429107FW1 2. Bandwidth 2.1 Test Result 2.1.1 OBW Mode TX Type Frequency (MHz) ANT 99% Occupied Bandwidth (MHz) Verdict Result Limit Zigbee SISO 2405 1 2.354 / Pass 2440 1 2.339 / Pass 2480 1 2.305 / Pass 2.1.2 6dB BW Mode TX Type Frequency (MHz) ANT 6dB Bandwidth (MHz) Verdict Result Limit Zigbee SISO 2405 1 1.569 >=0.5 Pass 2440 1 1.519 >=0.5 Pass 2480 1 1.526 >=0.5 Pass Page 6 of 21 Report No.: AiTSZ-260429107FW1 2.2 Test Graph 2.2.1 OBW Zigbee_LCH_2405MHz_Ant1_NTNV Zigbee_MCH_2440MHz_Ant1_NTNV Page 7 of 21 Report No.: AiTSZ-260429107FW1 Zigbee_HCH_2480MHz_Ant1_NTNV Page 8 of 21 Report No.: AiTSZ-260429107FW1 2.2.2 6dB BW Zigbee_LCH_2405MHz_Ant1_NTNV Zigbee_MCH_2440MHz_Ant1_NTNV Page 9 of 21 Report No.: AiTSZ-260429107FW1 Zigbee_HCH_2480MHz_Ant1_NTNV Page 10 of 21 Report No.: AiTSZ-260429107FW1 3. Maximum Conducted Output Power 3.1 Test Result 3.1.1 Power Mode TX Type Frequency (MHz) Maximum Peak Conducted Output Power (dBm) Verdict ANT1 Limit Zigbee SISO 2405 3.96 <=30 Pass 2440 1.99 <=30 Pass 2480 2.62 <=30 Pass Page 11 of 21 Report No.: AiTSZ-260429107FW1 3.2 Test Graph 3.2.1 Power Zigbee_LCH_2405MHz_Ant1_NTNV Zigbee_MCH_2440MHz_Ant1_NTNV Page 12 of 21 Report No.: AiTSZ-260429107FW1 Zigbee_HCH_2480MHz_Ant1_NTNV Page 13 of 21 Report No.: AiTSZ-260429107FW1 4. Maximum Power Spectral Density 4.1 Test Result 4.1.1 PSD Mode TX Type Frequency (MHz) Maximum PSD (dBm) Verdict ANT1 Limit(dBm/3kHz) Zigbee SISO 2405 2.21 <=8 Pass 2440 -0.27 <=8 Pass 2480 -0.11 <=8 Pass Page 14 of 21 Report No.: AiTSZ-260429107FW1 4.2 Test Graph 4.2.1 PSD Zigbee_LCH_2405MHz_Ant1_NTNV Zigbee_MCH_2440MHz_Ant1_NTNV Page 15 of 21 Report No.: AiTSZ-260429107FW1 Zigbee_HCH_2480MHz_Ant1_NTNV Page 16 of 21 Report No.: AiTSZ-260429107FW1 5. Unwanted Emissions In Non-restricted Frequency Bands 5.1 Test Result 5.1.1 Ref Mode TX Type Frequency (MHz) ANT Level of Reference (dBm) Zigbee SISO 2405 1 1.65 2440 1 -0.24 2480 1 -4.70 5.1.2 CSE Mode TX Type Frequency (MHz) ANT Level of Reference (dBm) Limit (dBm) Verdict Zigbee SISO 2405 1 1.65 -18.35 Pass 2440 1 -0.24 -20.24 Pass 2480 1 -4.70 -24.70 Pass Page 17 of 21 Report No.: AiTSZ-260429107FW1 5.2 Test Graph 5.2.1 Ref Zigbee_LCH_2405MHz_Ant1_NTNV Zigbee_MCH_2440MHz_Ant1_NTNV Page 18 of 21 Report No.: AiTSZ-260429107FW1 Zigbee_HCH_2480MHz_Ant1_NTNV Page 19 of 21 Report No.: AiTSZ-260429107FW1 5.2.2 CSE Zigbee_LCH_2405MHz_Ant1_NTNV Zigbee_LCH_2405MHz_Ant1_NTNV Page 20 of 21 Report No.: AiTSZ-260429107FW1 Zigbee_MCH_2440MHz_Ant1_NTNV Zigbee_HCH_2480MHz_Ant1_NTNV Page 21 of 21 Report No.: AiTSZ-260429107FW1 Zigbee_HCH_2480MHz_Ant1_NTNV ********************** End of Report **********************

Page 1 of 1 FCC ID: 2BOUN-HZ-WS-03