2BT3H-SDC-LE-01DModule SDC-LE-01D

FCC Statement Any Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. 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. FCC Radiation Exposure Statement: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment .This equipment should be installed and operated with minimum distance 20cm between the radiator& your body. This transmitter must not be located or operating in conjunction with any other antenna or transmitter. Note : 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. 8

Quanzhou STAYTRUE Electronic Technology Co.,Ltd ADD: Unit 1A-2,1st Floor,Building 1,Fengshu Logistics Park,No. 920,Binhu South Road,Taiwan Investment Zone,Quanzhou,Fujian Province, China TEL: +86-18589044591 FAX: +86-18589044591 E-mail: [email protected] 2026/06/12 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Attestation letter Dear Sir or Madam, The RF chip installed in our product: Module SDC-LE-01D, model: SDC-LE-01D-4pin, SDC- LE-01D-5pin, FCC ID: 2BT3H-SDC-LE-01D, for marketing purpose, only BLE 1Mbps (2402- 2480MHz) function were activated, the other functions, bands and modes was disabled to use by manufacturer in the software, the end user has no capability to activate it. Sincerely Yours, Signature: Printed Name: Guiping Lin Title: Manager

CFR 47 §2.911(d)(5)(i)(ii) Attestation Letter Quanzhou STAYTRUE Electronic Technology Co.,Ltd ADD: Unit 1A-2,1st Floor,Building 1,Fengshu Logistics Park,No. 920,Binhu South Road,Taiwan Investment Zone,Quanzhou,Fujian Province, China TEL: +86-18589044591 FAX: +86-18589044591 E-mail: [email protected] Attestation Letter Date: 2026-06-12 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(5)(i)(ii) Filing FCC ID: 2BT3H-SDC-LE-01D Quanzhou STAYTRUE Electronic Technology Co.,Ltd certifies that the equipment for which authorization is soughtis not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Quanzhou STAYTRUE Electronic Technology Co.,Ltd 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. Quanzhou STAYTRUE Electronic Technology Co.,Ltd certifies that the equipment does not use Kaspersky's software information. Sincerely, Signature: Printed Name: Guiping Lin Title: Manager

U.S. AGENT LETTER OF ATTESTATION Date: 2026-05-14 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(7) Filing FCC ID: 2BT3H-SDC-LE-01D Q uanzhou STAYTRUE Electronic Technology Co.,Ltd certifies that, as of the date of the filing of the application, Iconsigh is our designated U.S. agent for service of process for the above referenced FCC ID. Quanzhou STAYTRUE Electronic Technology 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. Iconsigh accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. D esignated U.S. Agent Information: Company Name: Iconsigh Address: 2310 Homestead Road, Suite C1, Los Altos, CA, 94024, USA FRN: 0033398652 Tel.: +1 (408) 320-9867 Email: [email protected] Signed by (printed name): Benjamin Kaur Signature: A pplicant: Quanzhou STAYTRUE Electronic Technology Co.,Ltd Address: Unit 1A-2,1st Floor,Building 1,Fengshu Logistics Park,No. 920,Binhu South Road,Taiwan Investment Zone,Quanzhou,Fujian Province, China FRN: 0037828738 Tel: +86-18589044591 Email: [email protected] Signed by (printed name): Guiping Lin Signature:

QA-FR-170-B Quanzhou STAYTRUE Electronic Technology Co.,Ltd ADD: Unit 1A-2,1st Floor,Building 1,Fengshu Logistics Park,No. 920,Binhu South Road,Taiwan Investment Zone,Quanzhou,Fujian Province, China TEL: +86-18589044591 FAX: +86-18589044591 E-mail: [email protected] FCC Authorization Date: 2026-06-12 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern: We, Quanzhou STAYTRUE Electronic Technology Co.,Ltd Hereby authorizes Bay Area Compliance Laboratories Corp. (Xiamen) to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by Bay Area Compliance Laboratories Corp. (Xiamen) on our behalf shall have the same effect as our own action. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. This authorization is valid until further written notice from the applicant. Sincerely Yours, Client’s signature Printed Name: Guiping Lin Title: Manager

QA-FR-171-A Quanzhou STAYTRUE Electronic Technology Co.,Ltd ADD: Unit 1A-2,1st Floor,Building 1,Fengshu Logistics Park,No. 920,Binhu South Road,Taiwan Investment Zone,Quanzhou,Fujian Province, China TEL: +86-18589044591 FAX: +86-18589044591 E-mail: [email protected] FCC Confidential Authorization Date: 2026-06-12 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: 2BT3H-SDC-LE-01D In accordance with Sections 0.457 and 0.459 of the Commission’s Rules, Quanzhou STAYTRUE Electronic Technology Co.,Ltd hereby requests long-term confidential treatment of information accompanying this application as outlined below:  Block Diagram  Schematics  Operation Description The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Sincerely, Signature: Printed Name: Guiping Lin Title: Manager

Quanzhou STAYTRUE Electronic Technology Co.,Ltd ADD: Unit 1A-2,1st Floor,Building 1,Fengshu Logistics Park,No. 920,Binhu South Road,Taiwan Investment Zone,Quanzhou,Fujian Province, China TEL: +86-18589044591 FAX: +86-18589044591 E-mail: [email protected] DECLARATION OF SIMILARITY Date: 2026-06-12 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Dear Sir or Madam: We, Quanzhou STAYTRUE Electronic Technology Co.,Ltd hereby declare that the product: Module SDC-LE-01D, FCC ID: 2BT3H-SDC-LE-01D, model: SDC-LE-01D-4pin, SDC-LE-01D-5pin, All the models are the same electromagnetic emissions and electromagnetic compatibility characteristics, only the model name and number of pins differently (The SDC-LE-01D-5pin has an extra I/O pin, which is reserved.), there is no other difference. Please contact me should there be need for any additional clarification or information. Best Regards, Signature: Printed Name: Guiping Lin Title: Manager

Quanzhou STAYTRUE Electronic Technology Co.,Ltd ADD: Unit 1A-2,1st Floor,Building 1,Fengshu Logistics Park,No. 920,Binhu South Road,Taiwan Investment Zone,Quanzhou,Fujian Province, China TEL: +86-18589044591 FAX: +86-18589044591 E-mail: [email protected] Modular Approval Letter Date: 2026-06-12 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 We, Quanzhou STAYTRUE Electronic Technology Co.,Ltd, hereby request Modular Approval for Product: Module SDC-LE-01D (Model number: SDC-LE-01D-4pin, SDC-LE-01D-5pin, FCC ID: 2BT3H-SDC-LE-01D).The EUT meet the requirements for modular approval as detailed in FCC 15.212. the requirements is described below: 1. The modular has RF shielding, please refer to the EUT photo. 2. The modular transmitter has buffered modulation/data inputs, Buffered data inputs stage has been integrated in chip (Model: WS8100). 3. The modular transmitter has its own power supply regulation. Please refer to the Block Diagram. 4. Comply with the antenna requirements of Section 15.203 15.205, 15.209 and 15.247, the modular have a PCB antenna permanently attached to the module, the maximum gain is 0 dBi. 5. The EUT was tested in a stand-alone configuration, please refer to setup photos exhibit for details. 6. The module labeled with its own FCC ID. 7. Comply with any specific rules or operating requirements that ordinarily apply to a complete transmitter and the manufacturer must provide adequate instructions along with the module to explain any such requirements. The necessary explanation to be complied with this requirement is contained in the user manual, band please refers to the User Manual. 8. Comply with any applicable RF exposure requirements satisfied with 47CFR §2.1091. 9. This modular transmitter consists of a single module. Sincerely, Signature: Printed Name: Guiping Lin Title: Manager

Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607S12991E-RF-EXP Page 1 / 4 EUT EXTERNAL PHOTOS SDC-LE-01D-4pin SDC-LE-01D-5pin Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607S12991E-RF-EXP Page 2 / 4 Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607S12991E-RF-EXP Page 3 / 4 Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607S12991E-RF-EXP Page 4 / 4

Label Label location FCC ID: 2BT3H-SDC-LE-01D

Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607S12991E-RF-INP Page 1 / 1 EUT INTERNAL PHOTOS BLE Antenna

FCC§15.247 (i), §1.1307(b)(1) & §2.1091 Page 1 of 7 RF EXPOSURE REPORT For Quanzhou STAYTRUE Electronic Technology Co.,Ltd Unit 1A-2,1st Floor,Building 1,Fengshu Logistics Park,No. 920,Binhu South Road,Taiwan Investment Zone,Quanzhou,Fujian Province, China FCC ID: 2BT3H-SDC-LE-01D Report Type: Original Report Product Name: Module SDC-LE-01D Re port Number: 2607S12991E-RF-02 Re port Date: 2026-06-02 Reviewed By: Ash Lin Approved By: Miles Chen Prepared By: Bay Area Compliance Laboratories Corp. (Xiamen) Unit 102, No. 902 Meifeng South Road, Binhai West Avenue Science and Technology Innovation Park, Torch High Tech Zone Xiamen, People's Republic of China Tel: +86-592-3200111 www.baclcorp.com.cn Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607S12991E-RF-02 FCC§15.247 (i), §1.1307(b)(1) & §2.1091 Page 2 of 7 TABLE OF CONTENTS REPORT REVISION HISTORY................................................................................................................................. 3 GENERAL INFORMATION ....................................................................................................................................... 4 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ..................................................................................... 4 FCC§15.247 (i), §1.1307(b)(1) & §2.1091 – MAXIMUM PERMISSIBLE EXPOSURE (MPE) ............................ 5 CALCULATED DATA: .................................................................................................................................................... 5 EUT PHOTOGRAPHS ................................................................................................................................................. 6 Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607S12991E-RF-02 FCC§15.247 (i), §1.1307(b)(1) & §2.1091 Page 3 of 7 REPORT REVISION HISTORY Number of Revisions Report No. Version Issue Date Description 0 2607S12991E-RF-02 R1V1 2026-06-02 Initial Release Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607S12991E-RF-02 FCC§15.247 (i), §1.1307(b)(1) & §2.1091 Page 4 of 7 GENERAL INFORMATION Product Description for Equipment under Test (EUT) Applicant: Quanzhou STAYTRUE Electronic Technology Co.,Ltd Product Name: Module SDC-LE-01D Tested Model: SDC-LE-01D-4pin Multiple Model(s): SDC-LE-01D-5pin Trade Mark: SDC-LE-01D Power Supply: DC 3.3V Maximum Peak Conducted Output Power: 3.49dBm Frequency Range: 2402-2480 MHz Modulation Technique: GFSK Antenna Type: PCB antenna ★Maximum Antenna Gain: 0dBi EUT Received Status: Good Note: 1. The Maximum Antenna Gain was declared by manufacturer. 2. The difference between tested model and series model are model name and number of pins, please refer to declaration letter for more detail. 3. The EUT supplied by the applicant was received on 2026-04-08. Test Facility The Test site used by Bay Area Compliance Laboratories Corp. (Xiamen) to collect test data is located on the Unit 102, No. 902 Meifeng South Road, Binhai West Avenue Science and Technology Innovation Park, Torch High Tech Zone Xiamen, People's Republic of China. Bay Area Compliance Laboratories Corp. (Xiamen) Lab is accredited to ISO/IEC 17025 by A2LA (Certificate Number: 7134.01) and the lab has been recognized as the FCC accredited lab under the KDB 974614 D01, the FCC Designation No. : CN1384. Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607S12991E-RF-02 FCC§15.247 (i), §1.1307(b)(1) & §2.1091 Page 5 of 7 FCC§15.247 (i), §1.1307(b)(1) & §2.1091 – MAXIMUM PERMISSIBLE EXPOSURE (MPE) Applicable Standard According to FCC §1.1307(b)(1) & §2.1091, systems operating under the provisions of this section shall be operated in a manner that ensure that the public is not exposed to radio frequency energy level in excess of the Commission’s guideline. Limits for Maximum Permissible Exposure (MPE) f = frequency in MHz; * = Plane-wave equivalent power density; According to §1.1307(b)(1) & §2.1091 RF exposure is calculated. Calculated Formulary: Predication of MPE limit at a given distance S = PG/4πR² = 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 (appropriate units, e.g., cm); Calculated Data: Mode Frequency (MHz) ★Antenna Gain ★Tune-up Output Power Evaluation Distance (cm) Power Density (mW/cm 2 ) MPE Limt (mW/cm 2 ) (dBi) (numeric) (dBm) (mW) BLE 2402-2480 0 1.00 3.5 2.24 20 0.0004 1 Note: 1. The Tune-up output power was declared by the Manufacturer. Result: The device meets MPE at distance 20cm. Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607S12991E-RF-02 FCC§15.247 (i), §1.1307(b)(1) & §2.1091 Page 6 of 7 EUT PHOTOGRAPHS Please refer to the attachment 2607S12991E-RF-EXP EUT EXTERNAL PHOTOGRAPHS and 2607S12991E-RF-INP EUT INTERNAL PHOTOGRAPHS. Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607S12991E-RF-02 FCC§15.247 (i), §1.1307(b)(1) & §2.1091 Page 7 of 7 Declarations 1. Bay Area Compliance Laboratories Corp. (Xiamen) is not responsible for authenticity of any information provided by the applicant. Information from the applicant that may affect test results are marked with an asterisk “★”. 2. Unless otherwise stated, the results shown in this test report refer only to the sample(s) tested. 3. Unless required by the rule provided by the applicant or product regulations, then decision rule in this report did not consider the uncertainty. 4. The extended uncertainty given in this report is obtained by combining the standard uncertainty times the coverage factor k with the 95% confidence interval. 5. This report cannot be reproduced except in full, without prior written approval of Bay Area Compliance Laboratories Corp. (Xiamen). 6. This report is valid only wit…

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Product specification Quick Reference Date Antenna module on the system board Frequency Range 2400 ~ 2500GHz Ant. Port Input Pwr. (dBm) 0 (Typ. BT class 2 output power) Peak EIRP(dBm) -1.2 Antenna gain (dBi) 0 Input Impendence(ohm) 50 Polarization Type V ertical & Horizontal V . S .W . R < 3 Manufacture Quanzhou STAYTRUE Electronic Technology Co.,Ltd Unit 1A-2,1st Floor,Building 1,Fengshu Logistics Park,No. 920,Binhu South Road,Taiwan Investment Zone,Quanzhou,Fujian Province, China All the technical data and information contained herein are subject to change without prior notice Antenna Layout & module on the system board Antenna Gain Freq(Mhz) Max(dB) Min(dB) Gain(dBi) Effi(%) 2402-0.24-16.8-0.2431 2440 0 -15.60 33 2480 -0.41-19.7-0.4129 ERP Freq(Mhz) TRP (dBm) NHPRP±45/NHPIS±45 (dBm) NHPRP±30/NHPIS±30 (dBm) 2402 -4.439329833-5.472563248-6.58401478 2440 -4.833811857-5.845939228-6.932441487 2480 -1.277852118-2.230627413-3.625901541 Return Loss 2D radiation pattern diagram XY-plane XZ-plane YZ-plane

FCC Part 15.247 Page 1 of 58 FCC PART 15.247 TEST REPORT For Quanzhou STAYTRUE Electronic Technology Co.,Ltd Unit 1A-2,1st Floor,Building 1,Fengshu Logistics Park,No. 920,Binhu South Road,Taiwan Investment Zone,Quanzhou,Fujian Province, China FCC ID: 2BT3H-SDC-LE-01D R eport Type: Original Report Product Name: Module SDC-LE-01D Report Number: 2607S12991E-RF-01 Report Date: 2026-06-02 Reviewed By: Ash Lin Approves By: Miles Chen Prepared By : Bay Area Compliance Laboratories Corp. (Xiamen) Unit 102, No. 902 Meifeng South Road, Binhai West Avenue Science and Technology Innovation Park, Torch High Tech Zone Xiamen, People's Republic of China Tel: +86-592-3200111 www.baclcorp.com.cn Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607S12991E-RF-01 FCC Part 15.247 Page 2 of 58 TABLE OF CONTENTS REPORT REVISION HISTORY................................................................................................................................. 4 GENERAL INFORMATION ....................................................................................................................................... 5 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ..................................................................................... 5 OBJECTIVE ................................................................................................................................................................... 5 TEST METHODOLOGY .................................................................................................................................................. 5 MEASUREMENT UNCERTAINTY .................................................................................................................................... 6 SYSTEM TEST CONFIGURATION .......................................................................................................................... 7 TEST MODE AND VOLTAGE .......................................................................................................................................... 7 DESCRIPTION OF TEST CONFIGURATION ...................................................................................................................... 7 EQUIPMENT MODIFICATIONS ....................................................................................................................................... 7 ★EUT EXERCISE SOFTWARE ...................................................................................................................................... 8 DUTY CYCLE ................................................................................................................................................................ 8 SUPPORT EQUIPMENT LIST AND DETAILS .................................................................................................................... 9 EXTERNAL I/O CABLE .................................................................................................................................................. 9 BLOCK DIAGRAM OF TEST SETUP ................................................................................................................................ 9 SUMMARY OF TEST RESULTS ............................................................................................................................. 11 TEST EQUIPMENT LIST ......................................................................................................................................... 12 FCC §15.203 - ANTENNA REQUIREMENT ........................................................................................................... 13 APPLICABLE STANDARD ............................................................................................................................................ 13 ANTENNA CONNECTOR CONSTRUCTION .................................................................................................................... 13 FCC §15.207 (a) – AC LINE CONDUCTED EMISSIONS ..................................................................................... 14 APPLICABLE STANDARD ............................................................................................................................................ 14 EUT SETUP ................................................................................................................................................................ 14 EMI TEST RECEIVER SETUP ....................................................................................................................................... 14 TEST PROCEDURE ...................................................................................................................................................... 15 RESULT &MARGIN CALCULATION ............................................................................................................................. 15 TEST DATA ................................................................................................................................................................ 16 FCC §15.209, §15.205 & §15.247(d) - SPURIOUS EMISSIONS ............................................................................. 18 APPLICABLE STANDARD ............................................................................................................................................ 18 EUT SETUP ................................................................................................................................................................ 18 EMI TEST RECEIVER & SPECTRUM ANALYZER SETUP .............................................................................................. 20 TEST PROCEDURE ...................................................................................................................................................... 21 RESULT &MARGIN CALCULATION ...................................................................…

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Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607S12991E-RF-TSP Page 1 / 5 EUT SETUP PHOTOS CE - Front View CE – Near View Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607S12991E-RF-TSP Page 2 / 5 Radiation Emission View (9kHz~30MHz) Radiation Emission - Front View (Below 1GHz) Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607S12991E-RF-TSP Page 3 / 5 Radiation Emission - Back View (Below 1GHz) Radiation Emission - Front View (1GHz-18GHz) Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607S12991E-RF-TSP Page 4 / 5 Radiation Emission - Back View (1GHz-18GHz) Radiation Emission - Front View (Above 18GHz) Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607S12991E-RF-TSP Page 5 / 5 Radiation Emission - Back View (Above 18GHz)