2BT3H-SDC-LE-02HDModule SDC-LE-02HD

1 / 8 Module SDC-LE-02HD Specification Document V1.0 edition revision content date Revision Author V1.0 Initial Version 2026/5/18 WZJ 2 / 8 1. Product Overview The SDC-LE-02HD is a dual-mode Bluetooth module featuring a plug-in interface, with serial port compatibility for 3.3V voltage levels. Its key features include: BT5.4 Dual Mode（PCaA15E2B On Board，QDID：215269） 16 -bit stereo, software EQ equalizer, 1-stage DRC dynamic range compression A 32-bit RISC-V CPU with a clock frequency of 125 MHz, featuring 4 MB of built- in Flash memory and 128 KB of built-in RAM. The radio frequency transmission power is 6 dBm, with a reception sensitivity of- 90.5 dBm at EDR (2 MHz bandwidth). UART serial port, MUTE mute control 2. Electrical Parameters electrical character name least value representative value crest value unit I/O supply voltage - 3.3 - V VDDIO - 3.3 - V working temperature -4085 °C Storage temperature -65150 °C *Absolute maximum rated value; exceeding this may cause chip damage. IO parameter name least value representative value crest value unit VIL -0.31.27 V VIH 2.03 3.6 V 3 / 8 3. External dimensions Front (TOP) appearance Back (-bottom) appearance Module Dimension Diagram 4 / 8 4. Pin Definition The SDC-LE-02HD features a total of 10 interfaces. pin Signal Name description Pin type PB1 AUDIO After audio connection, the output is low-level with a maximum voltage rating of 3.6 V. O（ output ） PE0 MUTE Mute control pin: Muted at low level O（ output ） AGND AGND Modularly P（ source ） DACL M DACL Left channel audio output O（ output ） DACR M DACR Right channel audio output O（ output ） PB0 APP After connection, the app outputs a low level with a maximum voltage rating of 3.6 V. O（ output ） VDD VDD Positive terminal of the power supply, operating voltage range: 3.0V to 6V (typically 5V) P（ source ） GND GND Power supply location P（ source ） (RX)PE6 UART_RX Serial RX data receiver, compatible with 3.3V/5V voltage levels I（ import ） (TX)PE7 UART_TX Serial TX data transmitter, compatible with 3.3V/5V voltage levels O（ output ） Pin Function Definition Table 5 / 8 5. plant use Furnace T emperature Curve Reflow soldering temperature curve It is recommended that the module undergo only one reflow soldering process. ultrasonic vibration Avoid exposing the module to vibrations from ultrasonic equipment such as ultrasonic welding machines or ultrasonic cleaners. The vibrations from such equipment may resonate with the internal crystal oscillator of the module, leading to oscillator failure or malfunction, which can result in the module failing to operate or experiencing performance degradation. For ultrasound application scenarios, please contact us to provide the specific model. 6. pack Packaging Type explain Bandage pack TBD Disk packaging TBD 6 / 8 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. 7 / 8 8 / 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] 2026/08/24 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-02HD, model: SDC-LE-02HD, FCC ID: 2BT3H-SDC-LE-02HD, for marketing purpose, only BT(GFSK , π/4-DQPSK, 8DPSK )(2402-2480MHz) & 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: 2026-08-24 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-02HD 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: 2026-06-24 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-02HD Quanzhou 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. Designated 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: Applicant: 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: 2026-08-24 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: 2026-08-24 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-02HD 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] Modular Approval Letter Date: 2026-08-24 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-02HD (Model number: SDC-LE-02HD, FCC ID: 2BT3H-SDC-LE-02HD).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: PCaA15E2B). 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 1.5 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.: 2607T23039E-RF-EXP Page 1 / 1 EUT EXTERNAL PHOTOS

Label Label location FCC ID: 2BT3H-SDC-LE-02HD

Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607T23039E-RF-INP Page 1 / 1 EUT INTERNAL PHOTOS Bluetooth Antenna

Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607T23039E-RF-01 FCC Part 15.247 Page 56 of 59 FCC §1.1307(b)(1) & §2.1091 – RF EXPOSURE INFORMATION 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) BT 2402-2480 1.5 1.41 3.5 2.24 20 0.0006 1 BLE 2402-2480 1.5 1.41 0.5 1.12 20 0.0003 1 Note: 1. The Tune-up output power was declared by the Manufacturer. 2. BT and BLE cannot transmit simultaneously. Result: The device meets MPE at distance 20cm.

ANTENNA SPECIFICATION ITEM ANT SPEC Model Name 2.4G ANT Center Frequency 2400MHz 2420MHz 2440MHz 2460MHz 2480MHz 2500MHz -1.17 dBi-1.23 dBi-0.74 dBi-0.36 dBi1.5 dBi 1.5 dBi MAX.Gain 1.5 dBi Test method - Azimuth Beam Pattern Omni- directional Impedance 50 Ohm Antenna Length 9mm*2.8mm 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 Antenna Length

FCC Part 15.247 Page 1 of 113 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-02HD Report Type: Original Report Product Name: Module SDC-LE-02HD Report Number: 2607T23039E-RF-02 Report Date: 2026-08-09 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.: 2607T23039E-RF-02 FCC Part 15.247 Page 2 of 113 TABLE OF CONTENTS REPORT REVISION HISTORY................................................................................................................................. 4 GENERAL INFORMATION ....................................................................................................................................... 5 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ..................................................................................... 5 OBJECTIVE ................................................................................................................................................................... 5 TEST METHODOLOGY .................................................................................................................................................. 5 TEST FACILITY ............................................................................................................................................................. 6 MEASUREMENT UNCERTAINTY .................................................................................................................................... 6 SYSTEM TEST CONFIGURATION .......................................................................................................................... 7 TEST MODE AND VOLTAGE .......................................................................................................................................... 7 DESCRIPTION OF TEST CONFIGURATION ...................................................................................................................... 7 ★EUT EXERCISE SOFTWARE ...................................................................................................................................... 7 SPECIAL ACCESSORIES ................................................................................................................................................. 7 EQUIPMENT MODIFICATIONS ....................................................................................................................................... 7 SUPPORT EQUIPMENT LIST AND DETAILS .................................................................................................................... 8 EXTERNAL I/O CABLE .................................................................................................................................................. 8 BLOCK DIAGRAM OF TEST SETUP ................................................................................................................................ 8 SUMMARY OF TEST RESULTS ............................................................................................................................. 10 TEST EQUIPMENT LIST ......................................................................................................................................... 11 FCC §15.203 – ANTENNA REQUIREMENT .......................................................................................................... 12 APPLICABLE STANDARD ............................................................................................................................................ 12 ANTENNA CONNECTOR CONSTRUCTION .................................................................................................................... 12 FCC §15.207 (a) – AC LINE CONDUCTED EMISSIONS ..................................................................................... 13 APPLICABLE STANDARD ............................................................................................................................................ 13 EUT SETUP ................................................................................................................................................................ 13 EMI TEST RECEIVER SETUP ....................................................................................................................................... 13 TEST PROCEDURE ...................................................................................................................................................... 14 RESULT &MARGIN CALCULATION ............................................................................................................................. 14 TEST DATA ................................................................................................................................................................ 15 FCC §15.205, §15.209 & §15.247(d) – RADIATED EMISSIONS ........................................................................... 17 APPLICABLE STANDARD ............................................................................................................................................ 17 TEST SYSTEM SETUP .................................................................................................................................................. 17 EMI TEST RECEIVER & SPECTRUM ANALYZER SETUP .............................................................................................. 19 FINAL MEASUUREMENT FOR EMISSION IDENTIFED DING THE PRE-SCAN: ........................................…

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Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607T23039E-RF-TSP Page 1 / 5 EUT SETUP PHOTOS CE - Front View CE – Side View Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607T23039E-RF-TSP Page 2 / 5 Radiation Emission View (9kHz~30MHz) Radiation Emission - Front View (Below 1GHz) Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2607T23039E-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.: 2607T23039E-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.: 2607T23039E-RF-TSP Page 5 / 5 Radiation Emission - Back View (Above 18GHz)