2APN5-BASICZB1GSPZigbee Smart Switch

Shenzhen Sonoff Technologies Co., Ltd. 2026-06-10 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: 2APN5- BASICZB1GSP) [Shenzhen Sonoff Technologies Co., Ltd.] (“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, Stan Li Manager Shenzhen Sonoff Technologies Co., Ltd. 3F & 6F, Bldg A, No. 663, Bulong Rd, Shenzhen, Guangdong, China Shenzhen Sonoff Technologies Co., Ltd. 2026-06-10 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: 2APN5- BASICZB1GSP) [Shenzhen Sonoff Technologies Co., Ltd.] (“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, Stan Li Manager Shenzhen Sonoff Technologies Co., Ltd. 3F & 6F, Bldg A, No. 663, Bulong Rd, Shenzhen, Guangdong, China

Attestation Statements (2026-06-10) 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: 2APN5- BASICZB1GSP) (Shenzhen Sonoff Technologies Co., Ltd.), the undersigned, hereby authorize (SONOFF TECHNOLOGY LLC) to act as our designated U.S. agent for service of process,( Shenzhen Sonoff Technologies Co., Ltd.) 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. (SONOFF TECHNOLOGY LLC) accepts the responsibility to act as designated U.S. agent for service of process. Applicant Information： Company name: Shenzhen Sonoff Technologies Co., Ltd. Contact Name: Stan Li Address: 3F & 6F, Bldg A, No. 663, Bulong Rd, Shenzhen, Guangdong, China FRN: 0027467786 Telephone No: 0755-29610458 Email: [email protected] Signature [Stan Li] U.S. Agent Information: Company Name: SONOFF TECHNOLOGY LLC Address: 14777 NE 40th St, Suite 201 Bellevue,WA 98007 FRN: 0035597152 Contact Name: KEBIN ZHANG Telephone No: 4256238360 Email: [email protected] Signature [KEBIN ZHANG]

Shenzhen Sonoff Technologies Co., Ltd. 2026-06-10 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Guangdong Global Testing Technology 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, Stan Li Manager Shenzhen Sonoff Technologies Co., Ltd. 3F & 6F, Bldg A, No. 663, Bulong Rd, Shenzhen, Guangdong, China

Shenzhen Sonoff Technologies Co., Ltd. 2026-06-10 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (EUT Name: Zigbee Smart Switch /Model: BASIC-ZB1GSP /FCC ID: 2APN5-BASICZB1GSP) 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, Operational Description, Schematics) 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, Stan Li Manager Shenzhen Sonoff Technologies Co., Ltd. 3F & 6F, Bldg A, No. 663, Bulong Rd, Shenzhen, Guangdong, China

External Photographs View of EUT-1 View of EUT-2 Page 2 of 3 View of EUT-3 View of EUT-4 Page 3 of 3 View of EUT-5 View of EUT-6

李文博 2026.03.13 主题字体：open sans semibold(sonoff主用的) 4 . 9 8 m m 3.97 mm 3 . 2 6 m m 4.36 mm 1 . 7 4 m m BASIC-ZB1GSP 5.32 mm 8.93 mm V1.2 1 字体：open sans semibold(sonoff主用的) ：10mm*10mm 2 2 . 8 3 m m 1 . 3 7 m m

Internal Photographs Internal View of EUT-1 Internal View of EUT-2 Page 2 of 4 Internal View of EUT-3 Internal View of EUT-4 Page 3 of 4 Internal View of EUT-5 Internal View of EUT-6 Page 4 of 4 Internal View of EUT-7 Internal View of EUT-8 Antenna

RF EXPOSURE EVALUATION According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency(RF) Radiation as specified in ß1.1307(b) FCC ID: 2APN5-BASICZB1GSP EUT Specification EUT Zigbee Smart Switch Frequency band (Operating) Zigbee: 2.405GHz ~ 2.480GHz Device category Portable (<20cm separation) Mobile (>20cm separation) Exposure classification Occupational/Controlled exposure (S = 5mW/cm 2 ) General Population/Uncontrolled exposure (S=1mW/cm 2 ) Antenna diversity Single antenna Multiple antennas Tx diversity Rx diversity Tx/Rx diversity Max. output power Zigbee: 7.77dBm Antenna gain (Max) 2.78dBi Evaluation applied MPE Evaluation SAR Evaluation Page 2 of 3 Limits for Maximum Permissible Exposure(MPE) Frequency Range(MHz) Electric Field Strength(V/m) Magnetic Field Strength(A/m) Power Density(mW/cm 2 ) Average Time (A) Limits for Occupational/Control Exposures 300-1500 -- -- F/300 6 1500-100000 -- -- 5 6 (B) Limits for General Population/Uncontrol Exposures 300-1500 -- -- F/1500 6 1500-100000 -- -- 1 30 Friis transmission formula: P d =(P out *G)\(4*pi*R 2 ) Where P d = Power density in mW/cm 2 , P out =output power to antenna in mW. G= gain of antenna in linear scale, Pi=3.1416 R= distance between observation point and center of the radiator in cm=20cm P d the limit of MPE, 1mW/cm 2 . If we know the maximum gain of the antenna and total power input to the antenna, through the calculation, we will know the distance where the MPE limit is reached. For multiple RF sources: Multiple RF sources are exempt if: in the case of fixed RF sources operating in the same time-averaging period, or of multiple mobile or portable RF sources within a device operating in the same time averaging period, if the sum of the fractional contributions to the applicable thresholds is less than or equal to 1 as indicated in the following equation Evaluated k : the maximum reported SAR or MPE of fixed, mobile, or portable RF source k either in the device or at the transmitter site from an existing evaluation at the location of exposure. Exposure Limit k : either the general population/uncontrolled maximum permissible exposure (MPE) or specific Absorption rate (SAR) limit for each fixed, mobile, or portable RF source k. Page 3 of 3 Measurement Result Zigbee: Mode Max Measured Power (dBm) Tune up tolerance (dBm) Max tune up conducted power(dBm) Output power (mW) Ant. Gain (dBi) Ant. Gain (numeric) Power density at 20cm (mW/ cm 2 ) Power density Limits (mW/ cm 2 ) Zigbee 7.77 7±1 8 6.310 2.78 1.897 0.00238 1 Signature: Alan He Date: 2026-6-8

SMD CERAMIC ANTENNA Data Sheet CS-2450-16-B For 2400-2500MHz 1.6x0.8x0.4mm [EIA1608] Chip Antenna Feature nLight weight, compact nWide bandwidth, low cost nBuilt-in antenna with high gain nOperating Temp. : -40°C~+85°C Application nBluetooth nWLAN 2.4 nWiFi 5/6/6E nUWB CS-2450-16-B Electrical Characteristics per line(TA=25°C) Parameter Specification Units Frequency Band 2400~2500 MHz Polarization Linear *Peak Gain 2.78 dBi *Peak Efficiency 80.25 % Impendance 50 Ω Test condition: Test board size 70*60 mm; Matching circuit: Pi matching circuit will be required. Product Dimension TECHNOLOGY Units:mm W A L A H LWHA 1.60±0.200.80±0.200.40±0.100.2±0.07 Recommend PCB Layout1 Chip Antenna Test condition: Test board size 70*60 mm; Top Layer (unit mm) Bottom Layer (unit mm) Feeding line:50Ω Chip Antenna E1(0201) 1.5 3.5 1.0 0.5 0.5 0.5 2.0 E2(0201) 1.5 3.5 2.0 E3(0201) 0.5 TECHNOLOGY ANT 1.1 Note:The spacing between antenna pads should not be ＜ 1.1mm 注意:天线焊盘内间距不能＜1.1mm 6.5 6.5 1.1 0.5 0.8 Recommend PCB Layout2 Chip Antenna Test condition: Test board size 70*60 mm; Chip Antenna TECHNOLOGY Top Layer (unit mm) Bottom Layer (unit mm) Feeding line:50Ω E1(0201) 1.5 2.0 0.5 0.5 0.5 10 1.5 10 E2(0201) E3(0201) 0.5 Note:The spacing between antenna pads should not be ＜ 1.1mm 注意:天线焊盘内间 距不能＜1.1mm 1 . 1 1.1 0.5 0.8 ANT PAD E2(0201) 2.0 1.5 Typical Characteristics Fig. 1 Return Loss Radiation Pattern The Gain pattern is measured in FAR -field chamber. DUT is placed on the table of rotator , a standard horn antenna and Vector Network Analyzer is used to collect data. Fig.2 FAR-field Chamber Chip Antenna TECHNOLOGY Chip Antenna Equivalent circuit: Chip Antenna RF chip ANT E1 E2 E3 Frequency 2400MHz2450MHz2500MHz Avg. gain - 1.92- 1.35- 1.56 Peak gain 1.792.782.66 Efficiency 74.5580.2576.98 Radiation Performance: 2D Gain Pattern X-Y Plane Y-Z Plane X-Z Plane TECHNOLOGY Item Condition Specification Thermal shock 1. 30±3 minutes at -40 ° C±5 ° C , 2. Convert to +105 ° C (5 minutes) 3. 30±3 minutes at +105 ° C±5 ° C , 4. Convert to -40 ° C (5 minutes) 5 . Total 100 continuous cycles No apparent damage Fulfill the electrical spec. after test. Humidity resistance 1. Humidity: 85% R.H. 2 . Temperature: 85±5 ° C 3 . Time: 1000 hours . No apparent damage Fulfill the electrical spec. after test. High temperature resistance No apparent damage Fulfill the electrical spec. after test. 1 . Temperature: 150 ° C±5 ° C 2 . Time: 1000 hours . Low temperature resistance 1 . Temperature: -40 ° C±5 ° C 2 . Time: 1000 hours . No apparent damage Fulfill the electrical spec. after test. Soldering heat resistance 1. Solder bath temperature : 260±5°C 2. Bathing time: 10±1 seconds No apparent damage Solderability The dipped surface of the terminal shall be at least 95% covered with solder after dipped in solder bath of 245±5°C for 3±1 seconds . No apparent damage (2) Storage Condition (a)At warehouse: The temperature should be within 0 ~ 30°C and humidity should be less than 60% RH.The product should be used within 1 year from the time of elivery. (b)On board: The temperature should be within -40 ~85°C and humidity should be less than 85% RH. ( 3) Operating Temperature Range Operating temperature range : -40°C to +85°C . Recommended Reflow Solder curve Chip Antenna TECHNOLOGY External Dimensions L*W (mm) 1.6*0.8 Central Frequency 2450 MHz Product Series: Chip Antenna Marking Part Number System CS - 2450 - 16-B Package Information Chip Antenna ( 1) Soldering Gun Procedure Note the follows, in case of using solder gun for replacement. (a) The tip temperature must be less than 350°C for the period within 3 seconds by using soldering gun under 30 W. (b) The soldering gun tip s hall not touch this product directly. (2) Soldering Volume Note that excess of soldering volume will easily get crack the body of this product. TECHNOLOGY AB C DEFLW 8.00±0.33.50± 0.051.75±0.12.00±0.054.00±0.11.50±0.11.87± 0.11.12± 0.1 The contents of this data sheet are subject to change without notice . Please confirm the specifications and delivery conditions when placing your order. © Copyright 2015 , Keweixin Electronics All rights reserved 订货信息Order Information Chip Antenna TECHNOLOGY Date Revision Description of changes 2023-01-03 1.0 First Version 2023-11-151.1 Add PCB Layout 2024-01-181.2 Modify PCB layout Device Package Net Weight Carrier Quantity HSF Status CS-2450-16-B 1608 0.002g Tape&Reel 5000pcs RoHS compliant Revision history

Duty Cycle Condition Mode Frequency (MHz) Antenna Duty Cycle (%) Correction Factor (dB) 1/T (kHz) NVNT Zigbee 2405 Ant1 100 0 0 NVNT Zigbee 2440 Ant1 100 0 0 NVNT Zigbee 2480 Ant1 100 0 0 2 / 22 Duty Cycle NVNT Zigbee 2405MHz Ant1 Duty Cycle NVNT Zigbee 2440MHz Ant1 3 / 22 Duty Cycle NVNT Zigbee 2480MHz Ant1 4 / 22 Maximum Peak Conducted Output Power Condition Mode Frequency (MHz) Antenna Conducted Power (dBm) Limit Conducted(dBm) Verdict NVNT Zigbee 2405 Ant1 7.62 30 Pass NVNT Zigbee 2440 Ant1 7.71 30 Pass NVNT Zigbee 2480 Ant1 7.77 30 Pass 5 / 22 Peak Power NVNT Zigbee 2405MHz Ant1 Peak Power NVNT Zigbee 2440MHz Ant1 6 / 22 Peak Power NVNT Zigbee 2480MHz Ant1 7 / 22 -6dB Bandwidth Condition Mode Frequency (MHz) Antenna -6 dB Bandwidth (MHz) Limit -6 dB Bandwidth (MHz) Verdict NVNT Zigbee 2405 Ant1 1.512 0.5 Pass NVNT Zigbee 2440 Ant1 1.552 0.5 Pass NVNT Zigbee 2480 Ant1 1.543 0.5 Pass 8 / 22 -6dB Bandwidth NVNT Zigbee 2405MHz Ant1 -6dB Bandwidth NVNT Zigbee 2440MHz Ant1 9 / 22 -6dB Bandwidth NVNT Zigbee 2480MHz Ant1 10 / 22 Occupied Channel Bandwidth Condition Mode Frequency (MHz) Antenna 99% OBW (MHz) NVNT Zigbee 2405 Ant1 2.283 NVNT Zigbee 2440 Ant1 2.271 NVNT Zigbee 2480 Ant1 2.248 11 / 22 OBW NVNT Zigbee 2405MHz Ant1 OBW NVNT Zigbee 2440MHz Ant1 12 / 22 OBW NVNT Zigbee 2480MHz Ant1 13 / 22 Maximum Power Spectral Density Level Condition Mode Frequency (MHz) Antenna Conducted PSD (dBm/3kHz) Limit (dBm/3kHz) Verdict NVNT Zigbee 2405 Ant1 -5.42 8 Pass NVNT Zigbee 2440 Ant1 -5.64 8 Pass NVNT Zigbee 2480 Ant1 -5.42 8 Pass 14 / 22 PSD NVNT Zigbee 2405MHz Ant1 PSD NVNT Zigbee 2440MHz Ant1 15 / 22 PSD NVNT Zigbee 2480MHz Ant1 16 / 22 Band Edge Condition Mode Frequency (MHz) Antenna Max Value (dBc) Limit (dBc) Verdict NVNT Zigbee 2405 Ant1 -44.63 -20 Pass NVNT Zigbee 2480 Ant1 -38.77 -20 Pass 17 / 22 Band Edge NVNT Zigbee 2405MHz Ant1 Ref Band Edge NVNT Zigbee 2405MHz Ant1 Emission 18 / 22 Band Edge NVNT Zigbee 2480MHz Ant1 Ref Band Edge NVNT Zigbee 2480MHz Ant1 Emission 19 / 22 Conducted RF Spurious Emission Condition Mode Frequency (MHz) Antenna Max Value (dBc) Limit (dBc) Verdict NVNT Zigbee 2405 Ant1 -58.54 -20 Pass NVNT Zigbee 2440 Ant1 -61.57 -20 Pass NVNT Zigbee 2480 Ant1 -60.79 -20 Pass 20 / 22 Tx. Spurious NVNT Zigbee 2405MHz Ant1 Ref Tx. Spurious NVNT Zigbee 2405MHz Ant1 Emission 21 / 22 Tx. Spurious NVNT Zigbee 2440MHz Ant1 Ref Tx. Spurious NVNT Zigbee 2440MHz Ant1 Emission 22 / 22 Tx. Spurious NVNT Zigbee 2480MHz Ant1 Ref Tx. Spurious NVNT Zigbee 2480MHz Ant1 Emission

TRF No.: 04-E001-0B TRF Originator: GTG TRF Date: 2023-12-13 Web: www.gtggroup.com E-mail: [email protected] Tel.: 86-400 755 8988 CFR 47 FCC PART 15 SUBPART C(DTS) TEST REPORT For Zigbee Smart Switch MODEL NUMBER: BASIC-ZB1GSP REPORT NUMBER: E04A26041316F00201 ISSUE DATE: June 8, 2026 FCC ID: 2APN5-BASICZB1GSP Prepared for Shenzhen Sonoff Technologies Co., Ltd. 3F & 6F, Bldg A, No. 663, Bulong Rd, Shenzhen, Guangdong, China Prepared by Guangdong Global Testing Technology Co., Ltd. Room 101-105, 203-210, Building 1, No.2, Keji 8 Road, Songshan Lake Park, Dongguan city, Guangdong, People’s Republic of China, 523808 This report is based on a single evaluation of the submitted sample(s) of the above mentioned product, it does not imply an assessment of the production of the products. This report shall not be reproduced, except in full, without the written approval of Guangdong Global Testing Technology Co., Ltd. REPORT NO.: E04A26041316F00201 Page 2 of 40 TRF No.: 04-E001-0B Global Testing , Great Quality. Revision History Rev. Issue Date Revisions Revised By V0 June 8, 2026 Initial Issue REPORT NO.: E04A26041316F00201 Page 3 of 40 TRF No.: 04-E001-0B Global Testing , Great Quality. Summary of Test Results Test Item Limit/Requirement Result Antenna Requirement FCC Part 15.203/15.247 (c) Pass AC Power Line Conducted Emission FCC Part 15.207 Pass Conducted Output Power FCC Part 15.247 (b)(3) Pass 6dB Bandwidth and 99% Occupied Bandwidth FCC Part 15.247 (a)(2) Pass Power Spectral Density FCC Part 15.247 (e) Pass Conducted Band edge and spurious emission FCC Part 15.247(d) Pass Radiated Band edge and Spurious Emission FCC Part 15.205/15.209 Pass Duty Cycle None; for reporting purposes only. Pass Note: 1. N/A: In this whole report not applicable. *This test report is only published to and used by the applicant, and it is not for evidence purpose in China. *The measurement result for the sample received is <Pass> according to <CFR 47 FCC PART 15 SUBPART C(DTS)> when <Accuracy Method> decision rule is applied. REPORT NO.: E04A26041316F00201 Page 4 of 40 TRF No.: 04-E001-0B Global Testing , Great Quality. CONTENTS 1. ATTESTATION OF TEST RESULTS ..................................................................................... 5 2. TEST METHODOLOGY ......................................................................................................... 6 3. FACILITIES AND ACCREDITATION ..................................................................................... 6 4. CALIBRATION AND UNCERTAINTY ................................................................................... 7 4.1. MEASURING INSTRUMENT CALIBRATION ........................................................... 7 4.2. MEASUREMENT UNCERTAINTY ............................................................................ 7 5. EQUIPMENT UNDER TEST .................................................................................................. 8 5.1. DESCRIPTION OF EUT ........................................................................................... 8 5.2. CHANNEL LIST ........................................................................................................ 8 5.3. MAXIMUM OUTPUT POWER ................................................................................... 8 5.4. TEST CHANNEL CONFIGURATION ........................................................................ 9 5.5. THE WORSE CASE POWER SETTING PARAMETER ............................................ 9 5.6. DESCRIPTION OF AVAILABLE ANTENNAS ........................................................... 9 5.7. SUPPORT UNITS FOR SYSTEM TEST ................................................................... 9 5.8. SETUP DIAGRAM .................................................................................................... 9 6. MEASURING EQUIPMENT AND SOFTWARE USED......................................................... 11 7. ANTENNA PORT TEST RESULTS ..................................................................................... 13 7.1. Conducted Output Power ........................................................................................ 13 7.2. 6dB Bandwidth and 99% Occupied Bandwidth ....................................................... 14 7.3. Power Spectral Density ........................................................................................... 16 7.4. Conducted Band edge and spurious emission ........................................................ 17 7.5. Duty Cycle .............................................................................................................. 19 8. RADIATED TEST RESULTS ............................................................................................... 20 8.1. Radiated Band edge and Spurious Emission .......................................................... 25 9. ANTENNA REQUIREMENT ................................................................................................ 37 10. AC POWER LINE CONDUCTED EMISSION ......................................................... 38 REPORT NO.: E04A26041316F00201 Page 5 of 40 TRF No.: 04-E001-0B Global Testing , Great Quality. 1. ATTESTATION OF TEST RESULTS Applicant Information Company Name: Shenzhen Sonoff Technologies Co., Ltd. Address: 3F & 6F, Bldg A, No. 663, Bulong Rd, Shenzhen, Guangdong, China Manufacturer Information Company Name: Shenzhen Sonoff Technologies Co., Ltd. Address: 3F & 6F, Bldg A, No. 663, Bulong Rd, Shenzhen, Guangdong, China EUT Information Product Description: Zigbee Smart Switch Model: BASIC-ZB1GSP Series Model: / Brand: / Sample Received Date: April 29, 2026 Sample Status: Normal Sample ID: A26041316 001 Date of Tested: April 29, 2026 to May 30, 2026 APPLICABLE STANDARDS STANDARD TEST RESULTS CFR 47 FCC PART 15 SUBPART C(DTS) Pass Prepared By: Checked By: Jok Yang Alan He Project Engineer Laboratory Manager Approved By: Alan He Laboratory Manager REPORT NO.: E04A26041316F00201 Page 6 of 40 T…

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Setup Photographs Radiated Band edge and Spurious Emission Page 2 of 3 Page 3 of 3 Conducted emissions