2AB22-LDHH251SDehumidifier

Form: RFT-AMER-TCB-OP-19n Revision: 1 Page 1 of 1 Date: 1/25/2023 Vesync (US) Corporation Attention: Application Examiner Re: Covered List, located at https://www.fcc.gov/supplychain/coveredlist and 47 CFR parts §2.903 and §2.911(d)(5)(ii) of the FCC rules Applicant: Vesync (US) Corporation FCC ID: 2AB22-LDHH251S To whom it may concern, [Vesync (US) Corporation] (“Applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to 47 CFR part §2.903 of the FCC rules and does not originate directly or indirectly from any company named on the covered list located in the link above or any subsidiary or affiliate thereof. Applicant further certifies that, as of the date of the filing of the application, the Applicant [is not] identified on the Covered List as an entity producing “covered” equipment and is not a subsidiary or affiliate of any such entity pursuant to 47 CFR part §1.50002 and required by 47 CFR part §2.911(d)(5)(ii) of the FCC rules. Applicant further certifies that no Cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software is installed in the equipment being certified. I HEREBY CERTIFY THAT I am authorized to make the representations above on behalf of the Applicant and agree to immediately notify Intertek if there is any change in the status identified above. [Signature of authorized Proprietor, Partner or Authorized Officer] [Printed Name] Wayne Pan [Title] Director, Product Compliance [Company name] Vesync (US) Corporation [Date] 2026 - 7 - 21

Form:RFT-AMER-TCB-OP-19oRevision:1Page 1 of 1 Date:1/25/2023 Vesync(US)Corporation Attention:ApplicationExaminer Re:CertificationdesignatingaU.S.agentforserviceofprocesspursuantto47CFRpart§2.911(d)(7)ofthe FCCrules Towhomitmayconcern, ThisletteristocertifythatVesync(US)Corporation(“Applicant”)acceptsresponsibilitiestoactasitsown agentpursuantto47CFRpart§2.911(d)(7)oftheFCCrulesforserviceofprocess.Iconsenttothe obligationtoacceptserviceofprocessonbehalfoftheapplicantinregardtotheFCCIDdesignatedbelow. IHEREBYCERTIFYTHATIamauthorizedtomaketherepresentationsaboveonbehalfoftheApplicant.I furtheracknowledgetherequirementtomaintainanagentextendsfornolessthanoneyearafterthe terminationofallmarketingandimportationortheconclusionofandcommission-relatedproceeding involvingtheequipmentandagreetoimmediatelynotifytheFCCandIntertekifthereisanychangeinthe statusidentifiedabove. Applicant CompanyName:Vesync(US)Corporation ContactName:Wayne.Pan Address:1775FLIGHTWAY,SUITE150TUSTIN,CA92782,USA TelephoneNo:+8618988680784 Email:[email protected] FCCID:2AB22-LDHH251S ApplicantFRN:0024621781 Signature:____________________________________ Date:__2026-7-21_____________________________

Vesync(US)Corporation 2026-7-21 FederalCommunicationsCommission 44512 th StreetSW Washington,DC20554 Subject:LimitedAgencyAgreement Vesync(US)Corporation FCCID:2AB22-LDHH251S ToWhomItMayConcern: We,(Vesync(US)Corporation),herebyauthorizedIntertekTestingServicestoactasourAgent forthepurposeofpreparingapplicationforFCCIDnumber(2AB22-LDHH251S )underallapplicablepartsoftheFCCrulesandregulations. Theeffectivedateofthislimitedagencyagreementis(2026-7-21).TheLimitedAgency Agreementexpireson(2027-7-21),unlesssoonerterminatedorextendedbywrittennoticeto IntertekTestingServicesandtheFederalCommunicationsCommission. ThisistoadvisethatweareinfullcompliancewiththeAnti-DrugAbuseAct.Theapplicantis notsubjecttoadenialoffederalbenefitspursuanttoSection5301oftheAnti-DrugActof1988, 21U.S.C.862,andnopartytotheapplicationissubjecttoadenialoffederalbenefitspursuantto thatsection. Ifyouhaveanyquestionsorcomments,pleasedonothesitatetocontactme. Sincerely, [Signature] [TypeName]WaynePan [TypeTitle]Director,ProductCompliance

1 ( 2 ) Vesync(US)Corporation Attention:Certificationreviewer RE:RequestforConfidentiality FCCID:2AB22-LDHH251S ToWhomItMayConcern: PermanentConfidentiality[Completethissectionifpermanentconfidentialityisrequested] Requesttowithholdpermanentlyfrompublicreviewcertainportionsoftheapplicationforequipment certificationforthereferencedFCCidentifiers.Thisrequestforconfidentialityismadepursuantto47CFR 0.457(d)and0.459oftheFCCRules.Inparticular,thefollowingsectionsoftheapplicationaretobekept permanentlyconfidential: [Selectoneormoreofitemsbelow,asappropriate] Schematics BlockDiagrams OperationalDescription Tune-upProcedure PartsList InternalPhotos(seenote) UsersManual(seenote) Note1:InternalPhotosmaybeheldconfidential1)ifthecircuitboardorinternalcomponentsarenotaccessibletousers.For example,itisacceptableifthecircuitboardisenclosedinepoxy.2)Also,itisacceptableifthedeviceisnot accessibletothepublic,forexample,adevicemountedonthetopofalargetower(orinafencedenclosure)such thatitisonlyserviceablebyprofessionaldesignatedtechniciansunderaNon-DisclosureAgreement(NDA).All salesforthesedevicesmustbeunderaNDArestrictingthedisclosureoftheproprietyinformation,including internalphotos. UsersManualmaybeheldconfidentialonlywhenthemanualcontainsproprietarytechnicalinformationintended forprofessionaltechniciansobligatedunderaNDA.Allsalesanddistributionoftheuser’smanualmustbeundera NDAthatrestrictsthedisclosureoftheinformation. IntheapplicationcoverletterrequestingpermanentconfidentialitythefollowingadditionaldescriptionandtheNDA exhibitisrequired: 1.Describeindetailhowinternalphotosand/orusersmanualinformationarecontrolledtopreventthemfrom becomingpublicordisclosedtounauthorizedpersons. 2.Describehowpublicaccessisrestrictedforproductsserviceablebyprofessionaldesignatedtechnicians. 3.Astatementthatallsalesofthenon-consumerdevicewillbeunderaNDAtoincludethirdpartysalesandthatthe finaluserofthedeviceissubjecttotheNDA. 4.ProvideanexampleoftheNDAbetweenthegranteeandapurchaser.Therequestforconfidentialitymust Note2:Forscanningreceiver,theschematics,blockdiagrams,operationaldescription,tune-upprocedure,partslistand internalphotosarealwaysheldpermanentlyconfidential. Short-termConfidentiality[Completethissectionifshort-termconfidentialityisrequested] Requesttowithholdfrompublicreviewforaperiodof60daysfromthedateoftheGrantofEquipment Authorizationandpriortomarketing,certainportionsoftheapplicationforequipmentcertificationforthe referencedFCCidentifiers.Thisrequestforconfidentialityismadepursuantto47CFR0.457(d)and0.459 oftheFCCRules.Inparticular,thefollowingsectionsoftheapplicationaretobekeptshort-term confidentialforaperiodabovefromthedateofthegrant [Selectoneormoreofitemsbelowthatarenotselectedinthelistabove,asappropriate] Schematics Blockdiagrams OperationalDescription Tune-upProcedure 2 ( 2 ) PartsList TestSetupPhotos ExternalPhotos InternalPhotos UsersManual Rationaleforrequestforconfidentiality: Wehaveinvestedconsiderabletimeandmaterialsinresearchanddevelopmenttoproducethereferenced product. Permanentconfidentiality:Disclosureofthepermanentlyconfidentialportionsofthisapplicationto competitorswouldnotonlygivethemsignificantcompetitiveadvantagesindevelopingsimilarproducts,but wouldalsodisclosesuccessfulimplementationofunpublished,leadingedgetechnologydevelopedbyus. Short-termconfidentiality:Disclosureoftheshort-termconfidentialportionsofthisapplicationduring theperiodofimportationand/ordistributionwouldrevealkeyaspectsofproprietarytechnologyto competitorsanddiminishthevalueofourinvestmentinresearchanddevelopment. Ifyouhavequestionsorneedfurtherinformation,pleasecontacttheundersigned. Sincerely, _________________ [Nameoftheapplicant/granteecontactofFCC]Wayne.Pan [Title]Director,ProductCompliance [Date]2026-7-21

Technical Description This dehumidifier operates at 110–120V AC, 60Hz. After power-on, press the dehumidification key to start dehumidifying. It also features a fan-only mode; press the corresponding key to switch modes. The unit can also be controlled via APP. Not support Simultaneous transmitting in 2.4GHz WiFi and Bluetooth. For more detail information pls. refer to the user manual. Bluetooth Version: BLE 5.0 (single mode) BLE Modulation Type: GFSK WiFi Modulation Type：BPSK, QPSK, 16QAM, 64QAM for OFDM; CCK, DQPSK, DBPSK for DSSS Antenna Type: Integrate antenna Antenna Gain: 1.4 dBi Normal operating temperature range: 5°C- 32°C Maximum operating temperature range: 32°C The nominal conducted output power specified (BLE): 4.0dBm (±2dB) The nominal conducted output power specified (WiFi): 20.0 dBm (±2dB) Main configuration as below: The function of main IC is mentioned as below. Main Board IC6: R5F100FF Display Board U1: FY80F498 WiFi Board U1: ESP32-C3-SOLO-1 Y1: Crystal Oscillator Frequency 40MHZ Channel List (BLE) 2402 2404 2406 2408 2410 2412 2414 2416 2418 2420 2422 2424 2426 2428 2430 2432 2434 2436 2438 2440 2442 2444 2446 2448 2450 2452 2454 2456 2458 2460 2462 2464 2466 2468 2470 2472 2474 2476 2478 2480 2.4G WIFI Channel List: 40 MHz 20 MHz 3 2422 MHz 1 2412 MHz 4 2427 MHz 2 2417 MHz 5 2432 MHz 3 2422 MHz 6 2437 MHz 4 2427 MHz 7 2442 MHz 5 2432 MHz 8 2447 MHz 6 2437 MHz 9 2452 MHz 7 2442 MHz 8 2447 MHz 9 2452 MHz 10 2457 MHz 11 2462 MHz

Vesync (US) Corporation 1775 FLIGHT WAY, SUITE 150 TUSTIN, CA 92782,USA Device: Dehumidifier FCC ID: 2AB22-LDHH251S Chipset/module information: # Chipset/module part number Memory size 1 R5F100FF 96KB 2 FY80F498 16KB 3 ESP32-C3-SOLO-1 4MB Operating System (as applicable):N/A Storage Capacity (hard drive or other permanent memory storage): N/A Device features: # Feature Yes / No 1 Designed not intended for software/program installation Y 2 Chipset/module has limited memory that is insufficient for the manufacturer to burn/pre-install programs/applications Y 3 No internet connection No (Because of insufficient memory, installation is not possible.) 4 No connector/port for computer connection Y Software BOM: Software name Version Manufacturer LDH-H321S- WUS_WIFI_C1_flash_v1.0.23.rel_32Mbit _DIO.bin V1.0.23 Vesync(US)Corporation 2 Justification: Based on the review of the above factsheet(s) and device features, the device cannot support installation of Kaspersky cybersecurity or anti-virus software. Name: Wayne Pan Date:2026/7/21

INTERTEK TESTING SERVICES RF Exposure The equipment under test (EUT) is a Dehumidifier with Bluetooth function operating in 2402-2480MHz, 2.4G WIFI function operating in 2412-2462MHz. The EUT is powered by 110–120V AC, 60Hz. For more detail information pls. refer to the user manual. BLE Bluetooth Version: 5.0 Antenna Type: Internal Antenna Antenna Gain: 1.4dBi The nominal conducted output power specified: 4.0dBm (Tolerance: +/-2dB). The maximun conducted output power for the EUT is 4.37dBm in the frequency 2480MHz which is within the production variation. The minimum conducted output power for the EUT is 3.08dBm in the frequency 2402MHz which is within the production variation. According to FCC Part 2.1091, this unlicensed transmitting devices is categorically excluded from routine environmental evaluation for RF exposure prior to equipment authorization or use, According to the KDB 447498 V06 and OET 65, the simple calculation as below: The source-based time averaged maximum radiated power = 6dBm + 1.4dBi = 7.4dBm = 5.50mW From above data, the exposed power density at a distance (R) of 20cm from the center of radiation of the antenna for 2.4GHz band can be calculated according to OET 65 as follow: = 5.50mW/ 4πR^2 = 0.001094 mW/cm^2 <1mW/cm^2 The MPE limit is 1.0 mW/cm^2 for general population and uncontrolled exposure in the WIFI frequency range according to FCC Part 1.1310. As the measured power density at 20cm from the transmitter is lower than the MPE limit, the compliance to the MPE limit can be ensured by indicating the minimum 20cm separation between the transmitter's radiating structure and body of the user or nearby persons. FCC ID: 2AB22-LDHH251S INTERTEK TESTING SERVICES 2.4GHz WiFi: Antenna Type: Internal Antenna Antenna Gain: 1.4dBi Modulation Type: BPSK, QPSK, 16QAM, 64QAM for OFDM; CCK, DQPSK, DBPSK for DSSS. The nominal conducted output power specified: 20.0dBm (Tolerance: +/-2dB). The maximun conducted output power for the EUT is 20.25dBm in the frequency 2462MHz(IEEE 802.11g) which is within the production variation. The minimum conducted output power for the EUT is 18.13dBm in the frequency 2422MHz(IEEE 802.11n40) which is within the production variation. According to FCC Part 2.1091, this unlicensed transmitting devices is categorically excluded from routine environmental evaluation for RF exposure prior to equipment authorization or use, According to the KDB 447498 V06 and OET 65, the simple calculation as below: The source-based time averaged maximum radiated power = 22.0dBm + 1.4dBi = 23.4 dBm = 218.78mW From above data, the exposed power density at a distance (R) of 20cm from the center of radiation of the antenna for 2.4GHz band can be calculated according to OET 65 as follow: = 218.78mW/ 4πR^2 = 0.0435 mW/cm^2 <1mW/cm^2 The MPE limit is 1.0 mW/cm^2 for general population and uncontrolled exposure in the WIFI frequency range according to FCC Part 1.1310. As the measured power density at 20cm from the transmitter is lower than the MPE limit, the compliance to the MPE limit can be ensured by indicating the minimum 20cm separation between the transmitter's radiating structure and body of the user or nearby persons. FCC ID: 2AB22-LDHH251S INTERTEK TESTING SERVICES Not support Simultaneous transmitting in 2.4GHz WiFi and Bluetooth. The following RF exposure statement or similar sentence is proposed to be included in the user manual: “FCC RF Radiation Exposure Statement Caution: This Transmitter must be installed to provide a separation distance of at least 20 cm from all persons.” FCC ID: 2AB22-LDHH251S

Appendix of 260423039SZN-001 Appendix A: -6dB Bandwidth .................................................................................................................................................................... 2 Appendix B: Maximum Power Spectral Density Level ............................................................................................................................... 5 Appendix C: Band Edge ........................................................................................................................................................................... 8 Appendix D: Conducted RF Spurious Emission ...................................................................................................................................... 11 Appendix of 260423039SZN-001 Appendix A: -6dB Bandwidth Condition Mode Frequency (MHz) Antenna -6 dB Bandwidth (MHz) Limit -6 dB Bandwidth (MHz) Verdict NVNT BLE 1M 2402 Ant1 0.677 0.5 Pass NVNT BLE 1M 2440 Ant1 0.641 0.5 Pass NVNT BLE 1M 2480 Ant1 0.669 0.5 Pass Appendix of 260423039SZN-001 -6dB Bandwidth NVNT BLE 1M 2402MHz Ant1 -6dB Bandwidth NVNT BLE 1M 2440MHz Ant1 Appendix of 260423039SZN-001 -6dB Bandwidth NVNT BLE 1M 2480MHz Ant1 Appendix of 260423039SZN-001 Appendix B: Maximum Power Spectral Density Level Condition Mode Frequency (MHz) Antenna Conducted PSD (dBm/3kHz) Duty Factor (dB) Total PSD (dBm/3kHz) Limit (dBm/3kHz) Verdict NVNT BLE 1M 2402 Ant1 -14.66 0 -14.66 8 Pass NVNT BLE 1M 2440 Ant1 -13.94 0 -13.94 8 Pass NVNT BLE 1M 2480 Ant1 -13.57 0 -13.57 8 Pass Appendix of 260423039SZN-001 PSD NVNT BLE 1M 2402MHz Ant1 PSD NVNT BLE 1M 2440MHz Ant1 Appendix of 260423039SZN-001 PSD NVNT BLE 1M 2480MHz Ant1 Appendix of 260423039SZN-001 Appendix C: Band Edge Condition Mode Frequency (MHz) Antenna Max Value (dBc) Limit (dBc) Verdict NVNT BLE 1M 2402 Ant1 -55.34 -20 Pass NVNT BLE 1M 2480 Ant1 -58.22 -20 Pass Appendix of 260423039SZN-001 Band Edge NVNT BLE 1M 2402MHz Ant1 Ref Band Edge NVNT BLE 1M 2402MHz Ant1 Emission Appendix of 260423039SZN-001 Band Edge NVNT BLE 1M 2480MHz Ant1 Ref Band Edge NVNT BLE 1M 2480MHz Ant1 Emission Appendix of 260423039SZN-001 Appendix D: Conducted RF Spurious Emission Condition Mode Frequency (MHz) Antenna Max Value (dBc) Limit (dBc) Verdict NVNT BLE 1M 2402 Ant1 -57.42 -20 Pass NVNT BLE 1M 2440 Ant1 -60.69 -20 Pass NVNT BLE 1M 2480 Ant1 -62.03 -20 Pass Appendix of 260423039SZN-001 Tx. Spurious NVNT BLE 1M 2402MHz Ant1 Ref Tx. Spurious NVNT BLE 1M 2402MHz Ant1 Emission Appendix of 260423039SZN-001 Tx. Spurious NVNT BLE 1M 2440MHz Ant1 Ref Tx. Spurious NVNT BLE 1M 2440MHz Ant1 Emission Appendix of 260423039SZN-001 Tx. Spurious NVNT BLE 1M 2480MHz Ant1 Ref Tx. Spurious NVNT BLE 1M 2480MHz Ant1 Emission

Appendix of 260423039SZN-002 Appendix A: -6dB Bandwidth .................................................................................................................................................................... 2 Appendix B: Maximum Power Spectral Density Level ............................................................................................................................... 9 Appendix C: Band Edge ......................................................................................................................................................................... 16 Appendix D: Conducted RF Spurious Emission ...................................................................................................................................... 25 Appendix of 260423039SZN-002 Appendix A: -6dB Bandwidth Condition Mode Frequency (MHz) Antenna -6 dB Bandwidth (MHz) Limit -6 dB Bandwidth (MHz) Verdict NVNT b 2412 Ant1 10.088 0.5 Pass NVNT b 2437 Ant1 9.228 0.5 Pass NVNT b 2462 Ant1 9.5 0.5 Pass NVNT g 2412 Ant1 16.496 0.5 Pass NVNT g 2437 Ant1 16.468 0.5 Pass NVNT g 2462 Ant1 16.536 0.5 Pass NVNT n20 2412 Ant1 17.464 0.5 Pass NVNT n20 2437 Ant1 17.488 0.5 Pass NVNT n20 2462 Ant1 17.424 0.5 Pass NVNT n40 2422 Ant1 35.704 0.5 Pass NVNT n40 2437 Ant1 35.728 0.5 Pass NVNT n40 2452 Ant1 35.64 0.5 Pass Appendix of 260423039SZN-002 -6dB Bandwidth NVNT b 2412MHz Ant1 -6dB Bandwidth NVNT b 2437MHz Ant1 Appendix of 260423039SZN-002 -6dB Bandwidth NVNT b 2462MHz Ant1 -6dB Bandwidth NVNT g 2412MHz Ant1 Appendix of 260423039SZN-002 -6dB Bandwidth NVNT g 2437MHz Ant1 -6dB Bandwidth NVNT g 2462MHz Ant1 Appendix of 260423039SZN-002 -6dB Bandwidth NVNT n20 2412MHz Ant1 -6dB Bandwidth NVNT n20 2437MHz Ant1 Appendix of 260423039SZN-002 -6dB Bandwidth NVNT n20 2462MHz Ant1 -6dB Bandwidth NVNT n40 2422MHz Ant1 Appendix of 260423039SZN-002 -6dB Bandwidth NVNT n40 2437MHz Ant1 -6dB Bandwidth NVNT n40 2452MHz Ant1 Appendix of 260423039SZN-002 Appendix B: Maximum Power Spectral Density Level Condition Mode Frequency (MHz) Antenna Conducted PSD (dBm/3kHz) Duty Factor (dB) Total PSD (dBm/3kHz) Limit (dBm/3kHz) Verdict NVNT b 2412 Ant1 -9.28 0 -9.28 8 Pass NVNT b 2437 Ant1 -9.35 0 -9.35 8 Pass NVNT b 2462 Ant1 -8.79 0 -8.79 8 Pass NVNT g 2412 Ant1 -12.72 0 -12.72 8 Pass NVNT g 2437 Ant1 -12.28 0 -12.28 8 Pass NVNT g 2462 Ant1 -11.98 0 -11.98 8 Pass NVNT n20 2412 Ant1 -13.59 0 -13.59 8 Pass NVNT n20 2437 Ant1 -13.41 0 -13.41 8 Pass NVNT n20 2462 Ant1 -13.28 0 -13.28 8 Pass NVNT n40 2422 Ant1 -17.09 0 -17.09 8 Pass NVNT n40 2437 Ant1 -16.86 0 -16.86 8 Pass NVNT n40 2452 Ant1 -16.78 0 -16.78 8 Pass Appendix of 260423039SZN-002 PSD NVNT b 2412MHz Ant1 PSD NVNT b 2437MHz Ant1 Appendix of 260423039SZN-002 PSD NVNT b 2462MHz Ant1 PSD NVNT g 2412MHz Ant1 Appendix of 260423039SZN-002 PSD NVNT g 2437MHz Ant1 PSD NVNT g 2462MHz Ant1 Appendix of 260423039SZN-002 PSD NVNT n20 2412MHz Ant1 PSD NVNT n20 2437MHz Ant1 Appendix of 260423039SZN-002 PSD NVNT n20 2462MHz Ant1 PSD NVNT n40 2422MHz Ant1 Appendix of 260423039SZN-002 PSD NVNT n40 2437MHz Ant1 PSD NVNT n40 2452MHz Ant1 Appendix of 260423039SZN-002 Appendix C: Band Edge Condition Mode Frequency (MHz) Antenna Max Value (dBc) Limit (dBc) Verdict NVNT b 2412 Ant1 -49.54 -20 Pass NVNT b 2462 Ant1 -56.38 -20 Pass NVNT g 2412 Ant1 -39.27 -20 Pass NVNT g 2462 Ant1 -47.07 -20 Pass NVNT n20 2412 Ant1 -39.89 -20 Pass NVNT n20 2462 Ant1 -45.52 -20 Pass NVNT n40 2422 Ant1 -36.98 -20 Pass NVNT n40 2452 Ant1 -38.99 -20 Pass Appendix of 260423039SZN-002 Band Edge NVNT b 2412MHz Ant1 Ref Band Edge NVNT b 2412MHz Ant1 Emission Appendix of 260423039SZN-002 Band Edge NVNT b 2462MHz Ant1 Ref Band Edge NVNT b 2462MHz Ant1 Emission Appendix of 260423039SZN-002 Band Edge NVNT g 2412MHz Ant1 Ref Band Edge NVNT g 2412MHz Ant1 Emission Appendix of 260423039SZN-002 Band Edge NVNT g 2462MHz Ant1 Ref Band Edge NVNT g 2462MHz Ant1 Emission Appendix of 260423039SZN-002 Band Edge NVNT n20 2412MHz Ant1 Ref Band Edge NVNT n20 2412MHz Ant1 Emission Appendix of 260423039SZN-002 Band Edge NVNT n20 2462MHz Ant1 Ref Band Edge NVNT n20 2462MHz Ant1 Emission Appendix of 260423039SZN-002 Band Edge NVNT n40 2422MHz Ant1 Ref Band Edge NVNT n40 2422MHz Ant1 Emission Appendix of 260423039SZN-002 Band Edge NVNT n40 2452MHz Ant1 Ref Band Edge NVNT n40 2452MHz Ant1 Emission Appendix of 260423039SZN-002 Appendix D: Conducted RF Spurious Emission Condition Mode Frequency (MHz) Antenna Max Value (dBc) Limit (dBc) Verdict NVNT b 2412 Ant1 -53.54 -20 Pass NVNT b 2437 Ant1 -51.96 -20 Pass NVNT b 2462 Ant1 -54.22 -20 Pass NVNT g 2412 Ant1 -48.67 -20 Pass NVNT g 2437 Ant1 -48.5 -20 Pass NVNT g 2462 Ant1 -50.19 -20 Pass NVNT n20 2412 Ant1 -48.24 -20 Pass NVNT n20 2437 Ant1 -48.18 -20 Pass NVNT n20 2462 Ant1 -49.01 -20 Pass NVNT n40 2422 Ant1 -44.85 -20 Pass NVNT n40 2437 Ant1 -44.82 -20 Pass NVNT n40 2452 Ant1 -45.05 -20 Pass Appendix of 260423039SZN-002 Tx. Spurious NVNT b 2412MHz Ant1 Ref Tx. Spurious NVNT b 2412MHz Ant1 Emission Appendix of 260423039SZN-002 Tx. Spurious NVNT b 2437MHz Ant1 Ref Tx. Spurious NVNT b 2437MHz Ant1 Emission Appendix of 260423039SZN-002 Tx. Spurious NVNT b 2462MHz Ant1 Ref Tx. Spurious NVNT b 2462MHz Ant1 Emission Appendix of 260423039SZN-002 Tx. Spurious NVNT g 2412MHz Ant1 Ref Tx. Spurious NVNT g 2412MHz Ant1 Emission Appendix of 260423039SZN-002 Tx. Spurious NVNT g 2437MHz Ant1 Ref Tx. Spurious NVNT g 2437MHz Ant1 Emission Appendix of 260423039SZN-002 Tx. Spurious NVNT g 2462MHz Ant1 Ref Tx. Spurious NVNT g 2462MHz Ant1 Emission Appendix of 260423039SZN-002 Tx. Spurious NVNT n20 2412MHz Ant1 Ref Tx. Spurious NVNT n20 2412MHz Ant1 Emission Appendix of 260423039SZN-002 Tx. Spurious NVNT n20 2437MHz Ant1 Ref Tx. Spurious NVNT n20 2437MHz Ant1 Emission Appendix of 260423039SZN-002 Tx. Spurious NVNT n20 2462MHz Ant1 Ref Tx. Spurious NVNT n20 2462MHz Ant1 Emission Appendix of 260423039SZN-002 Tx. Spurious NVNT n40 2422MHz Ant1 Ref Tx. Spurious NVNT n40 2422MHz Ant1 Emission Appendix of 260…

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Product Information ClientChen BeiProtocolWiFi+Ble Product Description50Pint DehumidifierSample Quantity1pcs Model TypeESP32-C3-SOLO-1SampelVersionTR3 Sample Picutres Antenna Test Report Antannamanufacturer imformation Name: EspressifSystems (Shanghai) Co., Ltd. Address: High-tech park in zhangjiangshanghai Model type: ESP32-C3-SOLO-1 Prepared ByMORLAB LABORATORY Adress F1, Building A, FeiYangScience and Technology Park, No.8, LongchangRd.,BaoanDistrict, Shenzhen, Guangdong Province, China TEL36698555 Test Data2025.08.13 EquipentManufacturerTypeSerial Number Calibration Date Effective Date Network Analyzer AglientE5071CMY461101402025.05.302026.05.29 Dark RoomETSAMS-8923-150TJ2235-Q17932024.11.302025.11.29 Test Data SVNEfficiency & Gain Frequency (MHz) Gain (dBi) Efficiency (%) Efficiency (dB) 2400 1.1 44.2 -3.5 2410 1.4 47.3 -3.3 2420 1.1 44.0 -3.6 2430 1.0 42.3 -3.7 2440 1.0 42.3 -3.7 2450 0.9 41.5 -3.8 2460 0.9 42.2 -3.7 2470 0.7 40.9 -3.9 2480 0.7 40.9 -3.9 2490 0.4 40.0 -4.0 2500 0.4 39.6 -4.0 3D (2450MHz)θ= 90°(XY Plane) φ= 0°（XZ Plane）φ= 90°(YZ Plane) Test Data Total Gain Gain (d Bi) -20 2 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 Z X Y Azi m uth = -21.1 El evati on = -87.8 Rol l = 158.8 Gain Gain (d Bi) Angle (°) Scal e: 2/di v Mi n: -18 Max : 0 0 180 30 210 60 240 90 270 120 300 150 330 2400 MHz 2410 MHz 2420 MHz 2430 MHz 2440 MHz 2450 MHz 2460 MHz 2470 MHz 2480 MHz 2490 MHz 2500 MHz Gain Gain (d Bi) Angle (°) Scal e: 1/di v Mi n: -8 Max : 2 0 180 30 210 60 240 90270 120 300 150 330 2400 MHz 2410 MHz 2420 MHz 2430 MHz 2440 MHz 2450 MHz 2460 MHz 2470 MHz 2480 MHz 2490 MHz 2500 MHz Gain Gain (d Bi) Angle (°) Scal e: 2/di v Mi n: -20 Max : 2 0 180 30 210 60 240 90270 120 300 150 330 2400 MHz 2410 MHz 2420 MHz 2430 MHz 2440 MHz 2450 MHz 2460 MHz 2470 MHz 2480 MHz 2490 MHz 2500 MHz

Vesync (US) Corporation TEST REPORT SCOPE OF WORK FCC TESTING–LDH-H251S-WUS, LDH-H251S-WCA, LDH- H251S-XXXX(Where "X" can be any alpha-numeric character from A to Z or 0-9 or may be blank to denote different countries, colors, customers or customer code or configurations and package.) REPORT NUMBER 260423039SZN-002 ISSUE DATE [REVISED DATE] 04 August 2026 [---------------------] PAGES 46 DOCUMENT CONTROL NUMBER FCC ID 247_b © 2017 INTERTEK Intertek Report No.: 260423039SZN-002 This report is for the exclusive use of Intertek's Client and is provided pursuant to the agreement between Intertek and its Client. Intertek's responsibility and liability are limited to the terms and conditions of the agreement. Intertek assumes no liability to any party, other than to the Client in accordance with the agreement, for any loss, expense or damage occasioned by the use of this report. Only the Client is authorized to permit copying or distribution of this report and then only in its entirety. Any use of the Intertek name or one of its marks for the sale or advertisement of the tested material, product or service must first be approved in writing by Intertek. The observations and test results in this report are relevant only to the sample tested. This report by itself does not imply that the material, product, or service is or has ever been under an Intertek certification program. Intertek Testing Services Shenzhen Ltd. Longhua Branch 101, 201, Building B, No. 308 Wuhe Avenue, Zhangkengjing Community, GuanHu Subdistrict, LongHua District, Shenzhen, P.R. China. Tel: (86 755) 8601 6288 Fax: (86 755) 8601 6751 Version: 01-November-2017 Page: 1 of 46 FCC ID 247_b TEST REPORT 101, 201, Building B, No. 308 Wuhe Avenue, Zhangkengjing Community, GuanHu Subdistrict, LongHua District, Shenzhen, P.R. China. Tel: (86 755) 8601 6288 Fax: (86 755) 8601 6751 www.intertek.com Vesync (US) Corporation Application For Certification FCC ID: 2AB22-LDHH251S Dehumidifier Model: LDH-H251S-WUS, LDH-H251S-WCA, LDH-H251S-XXXX(Where "X" can be any alpha-numeric character from A to Z or 0-9 or may be blank to denote different countries, colors, customers or customer code or configurations and package.) 2.4GHz Wi-Fi Transceiver Report No.: 260423039SZN-002 We hereby certify that the sample of the above item is considered to comply with the requirements of FCC Part 15, Subpart C for Intentional Radiator, mention 47 CFR [10-1-24] Prepared and Checked by: Approved by: Tenet Cao Johnny Wang Assistant Engineer Project Engineer Date: 04 August 2026 Intertek Report No.: 260423039SZN-002 Version: 01-November-2017 Page: 2 of 46 FCC ID 247_b TEST REPORT MEASUREMENT/TECHNICAL REPORT This report concerns (check one) Original Grant X Class II Change Equipment Type: DTS - Part 15 Digital Transmission Systems (Wi-Fi transmitter portion) Deferred grant requested per 47 CFR 0.457(d)(1)(ii)? Yes No X If yes, defer until: date Company Name agrees to notify the Commission by: date of the intended date of announcement of the product so that the grant can be issued on that date. Transition Rules Request per 15.37? Yes No X If no, assumed Part 15, Subpart C for intentional radiator - the new 47 CFR [10-01-24] Edition] provision. Report prepared by: Tenet Cao Intertek Testing Services Shenzhen Ltd. Longhua Branch 101, 201, Building B, No. 308 Wuhe Avenue, Zhangkengjing Community, GuanHu Subdistrict, LongHua District, Shenzhen, P.R. China. Tel: (86 755) 8601 6288 Fax: (86 755) 8601 6661 Intertek Report No.: 260423039SZN-002 Version: 01-November-2017 Page: 3 of 46 FCC ID 247_b TEST REPORT Table of Contents 1.0 Summary of Test Results ............................................................................................. 4 2.0 General Description .................................................................................................... 5 2.1 Product Description ......................................................................................................... 5 2.2 Related Submittal(s) Grants ............................................................................................. 5 2.3 Test Methodology ............................................................................................................ 5 2.4 Test Facility ...................................................................................................................... 5 3.0 System Test Configuration ........................................................................................... 6 3.1 Justification ...................................................................................................................... 6 3.2 EUT Exercising Software ................................................................................................... 6 3.3 Special Accessories .......................................................................................................... 6 3.4 Measurement Uncertainty ............................................................................................... 7 3.5 Equipment Modification .................................................................................................. 7 3.6 Support Equipment List and Description ........................................................................ 7 4.0 Measurement Results ................................................................................................. 8 4.1 Maximum Conducted Output Power at Antenna Terminals ............................................... 8 4.2 Minimum 6 dB RF Bandwidth ...................................................................................…

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