2A78BHU25-02EHumidifier

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Hualing Dong, President

GUANGDONG KEGAO ELECTRONICS CO.,LTD. Difference Declaration Date: July 6, 2023 We, GUANGDONG KEGAO ELECTRONICS CO.,LTD. declare that the difference among HU25-02E, HU25-03B, HU25-03D and HU35-02D as follow: HU25-03B is different from HU25-02E in the upper cover, other are same. HU25-03D is different from HU25-02E in the color of bottom base and upper cover, other are same. HU35-02D is different from HU25-02E in the shape, HU35-02D is square while HU25-02E is round, other are same. Sincerely GUANGDONG KEGAO ELECTRONICS CO.,LTD. Signature Becky Yuan / Manager Typed name and Title

Model HU25-02E Picture 1 Picture 2 Picture 3 Picture 4 Picture 5 Picture 6 Picture 7 Picture 8 Model HU25-03B Picture 9 Picture 10 Picture 11 Picture 12 Picture 13 Picture 14 Picture 15 Picture 16 Model HU25-03D Picture 17 Picture 18 Picture 19 Picture 20 Picture 21 Picture 22 Picture 23 Picture 24 Model HU35-02D Picture 25 Picture 26 Picture 27 Picture 28 Picture 29 Picture 30 Picture 31 Picture 32

Model HU25-02E 48 mm 23 mm Humidifier Model: HU25-02E Power: 24W Voltage: 24VDC FCC ID: 2A78BHU25-02E GUANGDONG KEGAOELECTRONICS CO.,LTD. No.39 East Science & TechnologyAve, Zone A Shishan Science & Technology Industrial Park, NanhaiDistrict, Foshan Guangdong Province Model HU25-03B 48 mm 23 mm Humidifier Model: HU25-03B Power: 24W Voltage: 24VDC FCC ID: 2A78BHU25-02E GUANGDONG KEGAOELECTRONICS CO.,LTD. No.39 East Science & TechnologyAve, Zone A Shishan Science & Technology Industrial Park, NanhaiDistrict, Foshan Guangdong Province Model HU25-03D - 48 mm 23 mm Humidifier Model: HU25-03D Power: 24W Voltage: 24VDC FCC ID: 2A78BHU25-02E GUANGDONG KEGAOELECTRONICS CO.,LTD. No.39 East Science & TechnologyAve, Zone A Shishan Science & Technology Industrial Park, NanhaiDistrict, Foshan Guangdong Province Model HU35-02D - 48 mm 23 mm Humidifier Model: HU25-02D Power: 24W Voltage: 24VDC FCC ID: 2A78BHU25-02E GUANGDONG KEGAOELECTRONICS CO.,LTD. No.39 East Science & TechnologyAve, Zone A Shishan Science & Technology Industrial Park, NanhaiDistrict, Foshan Guangdong Province

Model HU25‐25E Picture 1 Picture 2 Picture 3 Picture 4 Picture 5 Picture 6 Picture 7 Model HU25‐03B Picture 8 Picture 9 Picture 10 Picture 11 Picture 12 Picture 13 Picture 14 Model HU25‐03D Picture 15 Picture 16 Picture 17 Picture 18 Picture 19 Picture 20 Picture 21 Model HU35‐02D Picture 22 Picture 23 Picture 24 Picture 25 Picture 26 Picture 27 Picture 28

RF Exposure Requirements 1.1 General Information Client Information Applicant ....................................... : GUANGDONG KEGAO ELECTRONICS CO.,LTD. Address of applicant ................... : No.39 East Science & Technology Ave. Zone A Shishan Science &Technology Industrial Park, Nanhai District, Foshan, Guangdong, P.R.China. Manufacturer ................................. : The same as above Address of manufacturer ............. : The same as above General Description of E.U.T FCC ID ............................................ : 2A78BHU25-02E Product Name ............................... : Humidifier Model No. ..................................... : HU25-02E, HU25-02X, HU25-03B, HU25-03D, HU25-03X, HU35- 02D, HU35-02X (‘X’ can be A to Z, denotes the different appearance and color) Model Description ........................ : All models are identical except for the appearance and color. Therefore the full tests were performed on model HU25-02E. Rated Voltage ................................ : DC 24V, 1A Battery Capacity ........................... : --- Power Adapter .............................. : HCX2401-2401000U Input: 100-240V~, 50-60Hz, 0.8A; Output: DC 24V, 1A Technical Characteristics of EUT Support Standards ....................... : 802.11b, 802.11g, 802.11n Frequency Range ......................... : 2412-2462MHz for 802.11b/g/n(HT20) RF Output Power .......................... : 17.17dBm (Conducted ) Modulation .................................... : 802.11b: DSSS(DBPSK/DQPSK/CCK) 802.11g/n: OFDM (BPSK/QPSK/16QAM/64QAM) Data Rate ....................................... : 1Mbps for 802.11b; 54Mbps for 802.11g; MCS7 for 802.11n Quantity of Channels ................... 11 for 802.11b/g/n(HT20) Channel Separation ...................... 5MHz Type of Antenna ........................... PCB Printed Antenna Antenna Gain ................................ 0.26dBi Waltek Testing Group (Foshan) Co., Ltd. http://www.waltek.com.cn WT-510-201-12-A 2 Applicable Standard According to §1.1307(b)(1) and KDB 447498 D01 General RF Exposure Guidance v06, system operating under the provisions of this section shall be operating in a manner that the public is not exposed to radio frequency energy level in excess limit for maximum permissible exposure. (a) Limits for Occupational / Controlled Exposure Frequency range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/cm 2 ) Averaging Times | E | 2 , | H | 2 or S (minutes) 0.3-3.0 614 1.63 (100)* 6 3.0-30 1842/f 4.89/f (900/f)* 6 30-300 61.4 0.163 1.0 6 300-1500 / / F/300 6 1500-100000 / / 5 6 (b) Limits for General Population / Uncontrolled Exposure Frequency range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/cm 2 ) Averaging Times | E | 2 , | H | 2 or S (minutes) 0.3-1.34 614 1.63 (100)* 30 1.34-30 824/f 2.19/f (180/f)* 30 30-300 27.5 0.073 0.2 30 300-1500 / / F/1500 30 1500-100000 / / 1 30 Note: f = frequency in MHz: * = Plane-wave equivalents power density 3 Calculation Method S = (30*P*G) / (377*R 2 ) S = power density (in appropriate units, e.g., mw/cm 2 ) P = power input to the antenna (in appropriate units, e.g., mw) G = power gain of the antenna in the direction of interest relative to an isotropic radiator, the power gain factor is normally numeric gain. R = distance to the center of radiation of the antenna (in appropriate units, e.g., cm), R=20cm. 4 MPE Calculation Result Frequency (MHz) Antenna Gain (dBi) Numeric gain Conducted Power (dBm) Maximum Tune-up output power PD (mW/cm2) Limit (mW/cm2) (dBm) (mW) 2462 0.26 1.06 17.17 18.00 63.10 0.01 1.0 Result: Pass ======End of Report======

ReportNo.:RFI-LAB-RF-202305-EE29-2 QP030-E41 Page1of10 TestingReport CustomerName:GUANGDONGKEGAOELECTRONICSCO.,LTD ProductName:Humidifier SampleModel:HU25-02E ReferenceStandard:GB/T9410-2008;ANSI/IEEEStd149-2021 IssueDate:2023.5.31 Engineer:Date: Auditor:Date: Approver:Date: ReportNo.:RFI-LAB-RF-202305-EE29-2 QP030-E41 Page2of10 Version VersionNo.DateDescriptionFormulateApproval A02023.5.31Forthefirsttime,formulateJacksonEason Contents 1.GeneralInformation.........................................................................................................................3 1.1Generalinformationoftestinginstitutions...........................................................................3 1.2Testingprinciple...................................................................................................................3 1.3Testequipment......................................................................................................................4 1.4Testenvironment...................................................................................................................4 1.5Statement..............................................................................................................................4 2.SampleInformation.........................................................................................................................5 2.1Clientinformation.................................................................................................................5 2.2DescriptionofEUT(S)..........................................................................................................5 2.3EUTappearance....................................................................................................................6 2.4EUTsetupphotooffreespaceOTAtest..............................................................................6 3.TestResults......................................................................................................................................7 3.1Teststandard.........................................................................................................................7 3.2Testuncertainty.....................................................................................................................7 3.3Testdata................................................................................................................................8 3.3.1VSWRparameters.....................................................................................................8 3.3.2VSWRdata................................................................................................................8 3.3.3Typicalfreespaceefficiencyandgain......................................................................8 3.3.4Typicalfreespaceradiationpattern...........................................................................9 （Thefollowingisblank）..............................................................................................................10 ReportNo.:RFI-LAB-RF-202305-EE29-2 QP030-E41 Page3of10 1.GeneralInformation 1.1Generalinformationoftestinginstitutions Name ShenzhenRFI-LABCommunicationTechnologyCo.,Ltd. Address 10/FA,LingyunBld,LiufangRd,BaoanDistrict,SZ Tel / E-mail / Equipment AlltheequipmentusedinthereportisfixedinZoneB,WestSideof1/F,Building1, TingweiIndustrialPark,No.6LiufangRoad,Bao'anDistrict,Shenzhen 1.2Testingprinciple ReportNo.:RFI-LAB-RF-202305-EE29-2 QP030-E41 Page4of10 1.3Testequipment EquipmentModelNo.SerialNo.Manufacturer Calibration date Next calibration date OTATest System RayZone-5000 RFI-LAB-RF -D00 GTS2023.3.142025.3.13 Network Analyzer E5071C RFI-LAB-RF -D01 KEYSIGHT2023.5.112024.5.10 Network Analyzer E5071C RFI-LAB-RF -C02 KEYSIGHT2023.5.112024.5.10 1.4Testenvironment Temperature 24.2°C Humidity 58%RH Pressure 100.11kPa 1.5Statement (1)Thetestresultsinthereportareonlyapplicabletothetestedsamplesandthetestedsamples workundertheenvironmentdescribedinthereport. (2)OnlyShenzhenRFI-LABCommunicationTechnologyCo.,Ltd.havetherighttomodifythe report,andthemodificationinformationshallbeannotatedintherevisionform. (3)Anyobjectiontothisreportshallberaisedwithin30daysafterformalconfirmationofthe report. (4)Thisreportisinvalidifthereisanyevidencethatthesampleinformationprovidedisfalsified. (5)Thereportisinvalidwithoutthesignatureoftheauditorandapprover. ReportNo.:RFI-LAB-RF-202305-EE29-2 QP030-E41 Page5of10 2.SampleInformation 2.1Clientinformation Name GUANGDONGKEGAOELECTRONICSCO.,LTD Address No.39EastScience&TechnologyAve.ZoneAShishanScience &TechnologyIndustrialPark,NanhaiDistrict,Foshan,Guangdong, P.R.China. Contacts / Tel / E-mail / Manufacturer / 2.2DescriptionofEUT(S) ProductName Humidifier SampleModel HU25-02E AntennaSize / SerialNo. / AntennaType PCBAntenna TestItem VSWR;Antennagain;Efficiency;Radiationpattern FrequencyRange 2400-2500MHz ReceivedDate 2023.5.29 TestDate 2023.5.30 Remark / ReportNo.:RFI-LAB-RF-202305-EE29-2 QP030-E41 Page6of10 2.3EUTappearance 2.4EUTsetupphotooffreespaceOTAtest Planform Frontview ReportNo.:RFI-LAB-RF-202305-EE29-2 QP030-E41 Page7of10 3.TestResults 3.1Teststandard NameParameterMethodStandardno. Mobile communication antenna Antennagain Genericspecification forantennasusedinthe mobilecommunications GB/T 9410-2008 Radiationpattern VSWR Antenna Radiationefficiency IEEEStandardTest ProceduresforAntennas ANSI/IEEEStd 149-2021 Gainanddirectivity 3.2Testuncertainty TheuncertaintywascalculatedonthebasisoftheGUMpublishedbyISO,usingthe inclusionfactorofK=2andthe95%confidenceleveltoexpresstheextended uncertainty. ItemUncertainty VSWR±0.3 Antennagain±0.72dB Radiationefficiency±0.72dB ReportNo.:RFI-LAB-RF-202305-EE29-2 QP030-E41 Page8of10 3.3Testdata 3.3.1VSWRparameters 3.3.2VSWRdata 3.3.3Typicalfreespaceefficiencyandgain Frequency/MHz 240024502500 VSWR 1.81482.35382.8940 Frequency/MHz 24002410242024302440245024602470248024902500 PeakGain/dBi 0.260.050.00-0.040.020.030.0…

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Waltek Testing Group (Foshan) Co., Ltd. http://www.waltek.com.cn Page 1 of 58 WT-510-201-12-A EST REPORT Reference No. .................... : WTF23F05101689W FCC ID ................................ : 2A78BHU25-02E Applicant ............................ : GUANGDONG KEGAO ELECTRONICS CO.,LTD. Address .............................. : No.39 East Science & Technology Ave. Zone A Shishan Science &Technology Industrial Park, Nanhai District, Foshan, Guangdong, P.R.China. Manufacturer .................... : The same as above Address .............................. : The same as above Product Name .................... : Humidifier Model No. ........................... : HU25-02E, HU25-02X, HU25-03B, HU25-03D, HU25-03X, HU35-02D, HU35-02X (‘X’ can be A to Z, denotes the different appearance and color) Test specification .............. : FCC CFR47 Part 15 Subpart C (Section 15.247):2021 Date of Receipt sample .... : 2023-05-11 Date of Test ....................... : 2023-05-15 to 2023-05-30 Date of Issue ...................... : 2023-07-06 Test Report Form No. ....... : WEW-15247A-01A Test Result ......................... Pass Remarks: The results shown in this test report refer only to the sample(s) tested, this test report cannot be reproduced, except in full, without prior written permission of the company. The report would be invalid without specific stamp of test institute and the signatures of approver. Prepared By: Waltek Testing Group (Foshan) Co., Ltd. Address: No.13-19, 2/F., 2nd Building, Sunlink International Machinery City, Chencun, Shunde District, Foshan, Guangdong, China Tel:+86-757-23811398 Fax:+86-757-23811381 E-mail:[email protected] Tested by: Approved by: Roy Hong Danny Zhou Reference No.: WTF23F05101689W Page 2 of 58 Waltek Testing Group (Foshan) Co., Ltd. http://www.waltek.com.cn WT-510-201-12-A 1 Revision History Test Report No. Date of Issue Description Status WTF23F05101689W 2023-07-06 Original Valid Reference No.: WTF23F05101689W Page 3 of 58 Waltek Testing Group (Foshan) Co., Ltd. http://www.waltek.com.cn WT-510-201-12-A 2 Contents Page 1 REVISION HISTORY ................................................................................................................................. 2 2 CONTENTS ............................................................................................................................................... 3 3 GENERAL INFORMATION ....................................................................................................................... 4 3.1 GENERAL DESCRIPTION OF E.U.T ................................................................................................... 4 3.2 TECHNICAL CHARACTERISTICS OF EUT ........................................................................................... 4 3.3 STANDARDS APPLICABLE FOR TESTING ............................................................................................ 4 3.4 TEST FACILITY ................................................................................................................................ 5 3.5 SUBCONTRACTED ........................................................................................................................... 5 3.6 ABNORMALITIES FROM STANDARD CONDITIONS ................................................................................ 5 4 EUT SETUP AND TEST MODE ................................................................................................................ 6 5 EQUIPMENT USED DURING TEST ......................................................................................................... 7 5.1 EQUIPMENT LIST ............................................................................................................................. 7 5.2 TEST SOFTWARE ............................................................................................................................ 8 5.3 SPECIAL ACCESSORIES AND AUXILIARY EQUIPMENT ......................................................................... 8 5.4 MEASUREMENT UNCERTAINTY ......................................................................................................... 8 6 SUMMARY OF TEST RESULT ................................................................................................................ 9 6.1 ANTENNA REQUIREMENT ............................................................................................................... 10 6.2 RADIATED SPURIOUS EMISSIONS ................................................................................................... 11 6.3 POWER SPECTRAL DENSITY .......................................................................................................... 21 6.4 DTS BANDWIDTH .......................................................................................................................... 25 6.5 RF OUTPUT POWER ...................................................................................................................... 29 6.6 OUT OF BAND EMISSIONS .............................................................................................................. 34 6.7 CONDUCTED EMISSIONS................................................................................................................ 45 7 PHOTOGRAPHS TEST SETUP ............................................................................................................. 49 7.1 PHOTOGRAPHS - RADIATED EMISSION TEST SETUP ........................................................................ 49 7.2 PHOTOGRAPHS – CONDUCTED EMISSION TEST SETUP ................................................................... 50 8 PHOTOGRAPHS - CONSTRUCTIONAL DETAILS ............................................................................... 51 8.1 EUT - EXTERNAL PHOTOS ............................................................................................................. 51 8.2 EUT - INTERNAL PHOTOS .............................…

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Test Setup For Radiated Emission (30MHz to 1GHz) Test Setup For Radiated Emission (Above 1GHz) Test Setup For Conducted Emission