X4YHAAD300AROMA DIFFUSER

FCC Warning Statement Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. 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. ‐‐ Consult the dealer or an experienced radio/TV technician for help. FCC Radiation Exposure Statement The antennas used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co‐located for operating in conjunction with any other antenna or transmitter. 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.

Attestation Statements (2025/12/29) TO: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA RE: Attestation Statements Part 2.911(d)(7) request for (FCC ID: X4YHAAD300) (NEXXT SOLUTIONS), the undersigned, hereby authorize NEXXT SOLUTIONS to act as our designated U.S. agent for service of process, (NEXXT SOLUTIONS) accepts to maintain an agent 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. NEXXT SOLUTIONS accepts the responsibility to act as designated U.S. agent for service of process. Applicant Information： Company Name: NEXXT SOLUTIONS Address: 3505 N.W 107TH AVE. MIAMI, Florida 33178, United States Contact Name: Albert Mizrachi FRN: 0019499201 Telephone No: 786-280-7600 Email: [email protected] Signature [Albert Mizrachi] U.S. Agent Information: Company Name: NEXXT SOLUTIONS Address: 3505 N.W 107TH AVE. MIAMI, Florida 33178, United States Contact Name: Albert Mizrachi FRN: 0019499201 Telephone No: 786-280-7600 Email: [email protected] Signature [Albert Mizrachi]

(NEXXT SOLUTIONS) (2025/12/29) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for (FCC ID: X4YHAAD300) [NEXXT SOLUTIONS] (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. We also certify that, as of the date of the filing of the application, the equipment does not utilize cyber-security or anti-virus software from Kaspersky Lab, Inc, or any of its successors and assignees, which is also on the “covered list”. Sincerely, (Applicant signature) (Applicant printed name) Albert Mizrachi (NEXXT SOLUTIONS) (2025/12/29) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for (FCC ID: X4YHAAD300) [NEXXT SOLUTIONS] (“the applicant”) 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. Sincerely, (Applicant signature) (Applicant printed name) Albert Mizrachi

NEXXT SOLUTIONS 2025/12/29 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen STS Test Services Co., Ltd. to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Client’s signature: Client’s name / title : Albert Mizrachi / Vice president of product development Contact information / address: 3505 N.W 107TH AVE. MIAMI, Florida 33178, United States

NEXXT SOLUTIONS 2025/12/29 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR EUT NAME: AROMA DIFFUSER Trademark: N/A MODEL: NHA-A300 FCC ID: X4YHAAD300 To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the - Block Diagram - Schematics - Operational Description required to be submitted with this application be permanently withheld from public review. The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. Please contact me if there is any information you may need. Sincerely, Client’s signature: Client’s name / title : Albert Mizrachi / Vice president of product development Contact information / address: 3505 N.W 107TH AVE. MIAMI, Florida 33178, United States

Page 1 of 8 FCC ID: X4YHAAD300 External Photos Page 2 of 8 FCC ID: X4YHAAD300 Page 3 of 8 FCC ID: X4YHAAD300 Page 4 of 8 FCC ID: X4YHAAD300

Label & label location

Page 5 of 8 FCC ID: X4YHAAD300 Internal Photos Page 6 of 8 FCC ID: X4YHAAD300 Page 7 of 8 FCC ID: X4YHAAD300 Antenna Page 8 of 8 FCC ID: X4YHAAD300

The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the ShenZhen STS Test Services Co., Ltd. MPE Report Report No.: STS2512465H01 Issued for NEXXT SOLUTIONS 3505 N.W 107TH AVE. MIAMI, Florida 33178, United States Product Name: AROMA DIFFUSER Brand Name: N/A Model Name: NHA-A300 Series Model(s): N/A FCC ID: X4YHAAD300 Test Standard: FCC 47CFR §2.1091 Page 2 of 7 Report No.: STS2512465H01 TEST REPORT Applicant’s Name ................. : NEXXT SOLUTIONS Address ................................. : 3505 N.W 107TH AVE. MIAMI, Florida 33178, United States Manufacturer's Name ........... : Sungale Electronics (Shenzhen) Limited Address ................................. : No. 1302, DaHong High-Tech Park, No. 6-18, Xinhe Road,Xinqiao, BaoAn,Shenzhen 518125, CHINA Product Description Product Name ........................ : AROMA DIFFUSER Brand Name .......................... : N/A Model Name .......................... : NHA-A300 Series Model(s) ...................... : N/A Test Standards ..................... : FCC 47CFR §2.1091 447498 D01 Interim General RF Exposure Guidance v06 The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the ShenZhen STS Test Services Co., Ltd. Date of Test ........................................... : Date of receipt of test item ...................... : 18 Dec. 2025 Date (s) of performance of tests ............. : 18 Dec. 2025 to 25 Dec. 2025 Date of Issue .......................................... : 25 Dec. 2025 Test Result .............................................. : Pass Testing Engineer : (Aaron Bu) Technical Manager : (Skylar Li) Authorized Signatory : (Bovey Yang) Page 3 of 7 Report No.: STS2512465H01 TABLE OF CONTENTS 1. GENERAL INFORMATION 5 1.1 GENERAL DESCRIPTION OF THE EUT 5 1.2 TEST FACTORY 5 2. FCC 47CFR §2.1091 REQUIREMENT 6 2.1 TEST STANDARDS 6 2.2 LIMIT 6 2.3 TEST RESULT 7 Page 4 of 7 Report No.: STS2512465H01 Revision History Rev. Issue Date Report No. Effect Page Contents 00 25 Dec. 2025 STS2512465H01 ALL Initial Issue Page 5 of 7 Report No.: STS2512465H01 1. GENERAL INFORMATION 1.1 GENERAL DESCRIPTION OF THE EUT Product Name AROMA DIFFUSER Brand Name N/A Model Name NHA-A300 Series Model(s) N/A Model Difference N/A Product Description The EUT is a AROMA DIFFUSER Operation Frequency: 802.11b/g/n 20: 2412~2462 MHz Modulation Type: 802.11b(DSSS):CCK,DQPSK,DBPSK 802.11g(OFDM):BPSK,QPSK,16-QAM,64-Q AM 802.11n(OFDM):BPSK,QPSK,16-QAM,64-Q AM Bit Rate of Transmitter: 802.11b:11/5.5/2/1 Mbps 802.11g:54/48/36/24/18/12/9/6Mbps 802.11n(20MHz): 65/58.5/52/39/26/19.5/13/6.5Mbps Number of Channel: 802.11b/g/n: 11CH Antenna Type: Internal antenna Antenna Gain (dBi): 2.54 Power Rating Input: DC 5V Adapter N/A Battery N/A Hardware Version N/A Software Version N/A 1.2 TEST FACTORY SHENZHEN STS TEST SERVICES CO., LTD Add. : 101, Building B, Zhuoke Science Park, No.190 Chongqing Road, ZhanChengShequ, Fuhai Sub-District, Bao’an District, Shenzhen, Guang Dong, China FCC test Firm Registration Number: 625569 IC test Firm Registration Number: 12108A A2LA Certificate No.: 4338.01 Page 6 of 7 Report No.: STS2512465H01 2. FCC 47CFR §2.1091 REQUIREMENT 2.1 TEST STANDARDS The limit for Maximum Permissible Exposure (MPE) specified in FCC 1.1310 is followed. The gain of the antennas used in the product is extracted from the Antenna data sheets provided and also the maximum total power input to the antenna is measured. Through the Friis transmission formula and the maximum gain of the antenna, we can calculate the distance, away from the product, where the limit of MPE is reached. Although the Friis Transmission formula is far field assumption, the calculated result of that is an over-prediction for near field power density. It is taken as worst case to specify the safety range. 2.2 LIMIT According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environmental impact of the human exposure to radio-frequency (RF) radiation as specified in 1.1307 (b) Limits for Maximum Permissible Exposure (MPE) Frequency Range (MHz) Electric Field Strength (V/m) Magnetic Field Strength (A/m) Power Density (mW/cm²) Limits for Occupational / controlled Exposures 300 - 1500 -- -- F/300 3.0-30 1842/f 4.89/f *(900/f²) 1500 – 100000 -- -- 5.0 Limits for General population / Uncontrolled Exposure 300 - 1500 -- -- F/1500 1.34-30 824/f 2.19/f *(180f²) 1500 – 100000 -- -- 1.0 F= Frequency in MHz Friss Formula Friss Transmission Formula: Pd = (Pout * G) / (4*pi*r²) Where Pd = power density in mW/cm² Pout = output power to antenna in mW G = gain of antenna in linear scale Pi = 3.1416 R = Distance between observation point and the center of radiator in cm If we know the maximum gain of the antenna and the total output power to the antenna, through calculation, we will know MPE value at distance 20cm. Page 7 of 7 Report No.: STS2512465H01 2.3 TEST RESULT Tune up Mode Detector Tune up Power 802.11b PEAK 12±1dBm Note: 1. The Maxinum power is less than the limit, complies with the exemption requirements. 2. ERP = EIRP - 2.15 ※※※※※END OF THE REPORT※※※※※ Protocol Separati on distance (cm) Max Tune up power (dBm) ANT Gain (dBi) Max EIRP (dBm) Max EIRP (mW) Power Density (mW/cm²) Limit (mW/ cm²) Ratio Result 802.11b 20 13 2.54 15.54 35.81 0.0071 1 0.0004 Pass

AntennaSpecification Manufacture：TUYA ProductName：WBR3Antenna AntennaType：PCB TestDate：2021.05.20 Testedby：LongWang Approvedby：Licco Content 1.GeneralDescription.................................................................................1 2.TestConfigurations...................................................................................2 2.1TestEnvironment............................................................................2 2.2TestEquipment...............................................................................2 2.3TestPrinciple...................................................................................2 3.TestResults..............................................................................................3 3.1GainandEfficiency..........................................................................3 3.2RadiationPattern............................................................................4 4.AntennaDimensions................................................................................6 5.EUTPhoto................................................................................................6 6.TestSetupPhoto......................................................................................7 1 1.GeneralDescription ManufacturerHangzhouTuyaInformationTechnologyCo.,Ltd Address Room701,Building3,MoreCenter,No.87GuDunRoad, Hangzhou,Zhejiang,China TestLocation Room106,Building3,LetongSciencePark,No.500, QiuyiRoad,BinjiangDistrict,Hangzhou ProductNameWBR3Antenna Productmodel WBR3 AntennaType PCBAntenna TestItems Gain;Efficiency;RadiationPattern TestFrequency 2400-2500MHz TestStandard ANSI/IEEEStd149-1979 2 2.TestConfigurations 2.1TestEnvironment Temperature(°C)25 Humidity(%RH)60 AtmosphericPressure(kPa)100.5 2.2TestEquipment TestSystemTEM24Multi-probeMicrowaveChamber TestInstrumentAgilentE5071B 2.3TestPrinciple 3 3.TestResults 3.1GainandEfficiency Frequency(MHz)PeakGain(dBi)Efficiency(%) 2400 1.6252.29 2410 1.7152.17 2420 1.9353.14 2430 1.9854.16 2440 2.0057.62 2450 2.1759.64 2460 2.4561.55 2470 2.3860.64 2480 2.5462.86 2490 2.3059.85 2500 2.4960.41 4 3.2RadiationPattern Phi02D Phi902D 5 Theta902D 2480MHz3D 6 4.AntennaDimensions 5.EUTPhoto 7 6.TestSetupPhoto

The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the Shenzhen STS Test Services Co., Ltd. Radio Test Report Report No.:STS2512465W01 Issued for NEXXT SOLUTIONS 3505 N.W 107TH AVE. MIAMI, Florida 33178, United States Product Name: AROMA DIFFUSER Brand Name: N/A Model Name: NHA-A300 Series Model(s): N/A FCC ID: X4YHAAD300 Test Standards: FCC Part15.247 Page 2 of 69 Report No.: STS2512465W01 TEST REPORT Applicant’s Name ................. : NEXXT SOLUTIONS Address ................................. : 3505 N.W 107TH AVE. MIAMI, Florida 33178, United States Manufacturer's Name ........... : Sungale Electronics (Shenzhen) Limited Address ................................. : No. 1302, DaHong High-Tech Park, No. 6-18, Xinhe Road,Xinqiao, BaoAn,Shenzhen 518125, CHINA Product Description Product Name ........................ : AROMA DIFFUSER Brand Name ........................... : N/A Model Name .......................... : NHA-A300 Series Model(s) .................... : N/A Standards ............................. : FCC Part 15.247 Test Procedure........................: ANSI C63.10-2020 This device described above has been tested by STS, the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the Shenzhen STS Test Services Co., Ltd. Date of Test ........................................... : Date of receipt of test item ...................... : 22 Dec. 2025 Date (s) of performance of tests ............. : 22 Dec. 2025 to 25 Dec. 2025 Date of Issue .......................................... : 25 Dec. 2025 Test Result .............................................. : Pass Testing Engineer : (Aaron Bu) Technical Manager : (Skylar Li) Authorized Signatory : (Bovey Yang) Page 3 of 69 Report No.: STS2512465W01 Table of Contents Page 1. SUMMARY OF TEST RESULTS 6 1.1 TEST FACTORY 7 1.2 MEASUREMENT UNCERTAINTY 7 2. GENERAL INFORMATION 8 2.1 GENERAL DESCRIPTION OF THE EUT 8 2.2 DESCRIPTION OF THE TEST MODES 10 2.3 TEST SOFTWARE AND POWER LEVEL 10 2.4 BLOCK DIAGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 11 2.5 DESCRIPTION OF NECESSARY ACCESSORIES AND SUPPORT UNITS 11 2.6 EQUIPMENTS LIST FOR ALL TEST ITEMS 12 3. EMC EMISSION TEST 13 3.1 CONDUCTED EMISSION MEASUREMENT 13 3.2 RADIATED EMISSION MEASUREMENT 17 4. CONDUCTED SPURIOUS & BAND EDGE EMISSION 31 4.1 LIMIT 31 4.2 TEST PROCEDURE 31 4.3 DEVIATION FROM STANDARD 31 4.4 TEST SETUP 31 4.5 EUT OPERATION CONDITIONS 31 4.6 TEST RESULTS 31 5. POWER SPECTRAL DENSITY TEST 32 5.1 LIMIT 32 5.2 TEST PROCEDURE 32 5.3 DEVIATION FROM STANDARD 32 5.4 TEST SETUP 32 5.5 EUT OPERATION CONDITIONS 32 5.6 TEST RESULTS 32 6. BANDWIDTH TEST 33 6.1 LIMIT 33 6.2 TEST PROCEDURE 33 6.3 DEVIATION FROM STANDARD 33 6.4 TEST SETUP 33 6.5 EUT OPERATION CONDITIONS 33 Page 4 of 69 Report No.: STS2512465W01 Table of Contents Page 6.6 TEST RESULTS 33 7. PEAK OUTPUT POWER TEST 34 7.1 LIMIT 34 7.2 TEST PROCEDURE 34 7.3 DEVIATION FROM STANDARD 34 7.4 TEST SETUP 34 7.5 EUT OPERATION CONDITIONS 34 7.6 TEST RESULTS 34 8. ANTENNA REQUIREMENT 35 8.1 STANDARD REQUIREMENT 35 8.2 EUT ANTENNA 35 APPENDIX 1-TEST DATA 36 DUTY CYCLE 36 MAXIMUM CONDUCTED OUTPUT POWER 39 -6DB BANDWIDTH 40 MAXIMUM POWER SPECTRAL DENSITY LEVEL 46 BAND EDGE 52 CONDUCTED RF SPURIOUS EMISSION 59 APPENDIX 2-PHOTOS OF TEST SETUP 69 Page 5 of 69 Report No.: STS2512465W01 Revision History Rev. Issue Date Report No. Effect Page Contents 00 25 Dec. 2025 STS2512465W01 ALL Initial Issue Page 6 of 69 Report No.: STS2512465W01 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: KDB 558074 D01 15.247 Meas Guidance v05r02. FCC Part 15.247,Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS -- 15.247 (a)(2) 6dB Bandwidth PASS -- 15.247 (b)(3) Output Power PASS -- 15.209 Radiated Spurious Emission PASS -- 15.247 (d) Conducted Spurious & Band Edge Emission PASS -- 15.247 (e) Power Spectral Density PASS -- 15.205 Restricted Band Edge Emission PASS -- Part 15.247(d)/ part 15.209(a) Band Edge Emission PASS -- 15.203 Antenna Requirement PASS -- NOTE: (1) ‘N/A’ denotes test is not applicable in this Test Report. (2) All tests are according to ANSI C63.10-2020. Page 7 of 69 Report No.: STS2512465W01 1.1 TEST FACTORY SHENZHEN STS TEST SERVICES CO., LTD Add. : 101, Building B, Zhuoke Science Park, No.190 Chongqing Road, ZhanChengShequ, Fuhai Sub-District, Bao’an District, Shenzhen, Guang Dong, China FCC test Firm Registration Number: 625569 IC test Firm Registration Number: 12108A A2LA Certificate No.: 4338.01 1.2 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ±U, where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2, providing a level of confidence of approximately 95 %. No. Item Uncertainty 1 RF output power, conducted ±0.751dB 2 Unwanted Emissions, conducted ±2.888dB 3 All emissions, radiated 9K-30MHz ±2.48dB 4 All emissions, radiated 30M-1GHz ±2.52dB 5 All emissions, radiated 1G-18GHz ±3.48dB 6 All emissions, radiated>18GHz ±4.18dB 7 Conducted Emission (9KHz-150KHz) ±2.48dB 8 Conducted Emission (150KHz-30MHz) ±2.52dB 9 Occupied Channel Bandwidth ±3.6% 10 Power Spectral Density, conducted ±1.214dB 11 Duty Cycle ±3.2% Page 8 of 69 Report No.: STS2512465W01 2. GENERAL INFORMATION 2.1 GENERAL DESCRIPTION OF THE EUT Product Name AROMA DIFFUSER Brand Name N/A Model Name NHA-A300 Series Model(s) N/A Model Difference N/A Product Description The EUT is a AROMA DIFFUSER Operation Frequency: 802.11b/g/n 20: 2412~2462 MHz Modulation Type: 802.11b(DSSS):CCK,DQPSK,DBPSK 802.11g(OFDM):BPSK,QPSK,16-QAM,64-QAM 802.11n(OFDM):BPSK,QPSK,16-QAM,64-QAM Bit Rat…

Text truncated - open the document above for the full version.

Page 1 of 2 FCC ID: X4YHAAD300 Conducted emissions 30MHz-1GHz Page 2 of 2 FCC ID: X4YHAAD300 Spurious emissions

Page 1 of 2 FCC ID: X4YHAAD300 Conducted emissions 30MHz-1GHz Page 2 of 2 FCC ID: X4YHAAD300 Spurious emissions