FCC ID SD4-K3CJ
Smart Access Controller
by BYD Auto Industry Company Limited
Grantee Code: SD4 Product Code: K3CJ
Latest application date: 2026-10-09
FCC ID Device Details
| FCC ID | SD4-K3CJ |
|---|---|
| Mirrors | fcc.id | gov | fccid.ai |
| Grantee Code | SD4 |
| Product Code | K3CJ |
| Applicant Business | BYD Auto Industry Company Limited 🇨🇳 |
| Related Domains |  byd.com  fccusagent.com |
| Equipment Class | Smart Access Controller |
| Test Firm | Centre Testing International Group Co., Ltd |
Operating Frequencies
| Frequency Range | Application Purpose | Final Action Date |
|---|---|---|
| 13.56 MHz | Original Equipment | 2026-10-09 |
| 2402-2480 MHz | Original Equipment | 2026-10-09 |
Exhibits
| Document | Type | Available | File |
|---|---|---|---|
| Label | ID Label/Location Info | 2026-10-09 | PDF 1.8 MB |
| Antenna specification | Test Report | 2026-10-09 | PDF 323.8 KB |
| Test report | Test Report | 2026-10-09 | PDF 4.5 MB |
| Test report appendix part1 | Test Report | 2026-10-09 | PDF 3.1 MB |
| Test report appendix part2 | Test Report | 2026-10-09 | PDF 4.9 MB |
| Test report part1 | Test Report | 2026-10-09 | PDF 5.3 MB |
| Test report part2 | Test Report | 2026-10-09 | PDF 2.4 MB |
| Attestation Section 2.911(d)(5)(i) and (ii) Filing | Attestation Statements | 2026-10-09 | PDF 115.2 KB |
| US Agent letter | Attestation Statements | 2026-10-09 | PDF 186.5 KB |
| Confidentiality letter | Cover Letter(s) | 2026-10-09 | PDF 113.8 KB |
| POA letter | Cover Letter(s) | 2026-10-09 | PDF 120.3 KB |
| RF exposure | RF Exposure Info | 2026-10-09 | PDF 965.4 KB |
| User manual Metadata only | Users Manual | 2027-04-06 | PDF 3.6 MB |
| Antenna photos Metadata only | Internal Photos | 2027-04-06 | PDF 430.7 KB |
| Internal photos Metadata only | Internal Photos | 2027-04-06 | PDF 3 MB |
| External photos Metadata only | External Photos | 2027-04-06 | PDF 1.7 MB |
| Test setup photos Metadata only | Test Setup Photos | 2027-04-06 | PDF 1.6 MB |
| Block Diagram Metadata only | Block Diagram | PDF 3.5 MB | |
| Schematics Metadata only | Schematics | PDF 947.4 KB | |
| Operational Description Metadata only | Operational Description | PDF 3.5 MB |
Application Information
| Application ID | YIu68VlY9GYeu3u/oDC5dw== |
|---|---|
| Final Action Date | 2026-10-09 |
| Application Purpose | Original Equipment |
| Applicant FRN | 0022593115 |
| Model | K3CJ |
| Frequency Range | 13.56 MHz |
| Equipment Class | DXX - Part 15 Low Power Communication Device Transmitter |
| Device Description | Smart Access Controller |
| Responsible Party | Gong liquan, gong.liquan@byd.com , 13980278051 |
| Non-Technical Contact | Tim Payne, FCC US Agent, LLC, Support@FCCUSAgent.com , 708-571-3148 |
| Test Firm | Vicky Zhou, Centre Testing International Group Co., Ltd, zhoushuping@cti-cert.com  , 86-755-3368-1398 |
| TCB Email | cb@industrial-ia.com  |
| TCB Scope | A1: Low Power Transmitters below 1 GHz (except Spread Spectrum), Unintentional Radiators, EAS (Part 11) & Consumer ISM devices |
| Short-Term Confidentiality | Yes |
| Long-Term Confidentiality | Yes |
| Modular Equipment | Does not apply |
| Composite Device | Yes |
| Cognitive Radio | No |
| Authorization Waiver | No |
| Authorization Waiver Approved | No |
| Section 5301 Certification | Yes |
| Related OET Knowledge DataBase Inquiry | No |
Applications
| Application ID | Date | Purpose |
|---|---|---|
| YIu68VlY9GYeu3u/oDC5dw== | 2026-10-09 | Original Equipment |
| 6HtPsxPQhXw4NICsuEIjsw== | 2026-10-09 | Original Equipment |
Grants
TCB Grant - Application YIu68VlY9GYeu3u/oDC5dw==
| TCB | GRANT OF EQUIPMENT AUTHORIZATION |
TCB |
| Certification | ||
| Issued Under the Authority of the | ||
| Federal Communications Commission | ||
| By: |
|
IIA Lab Services, LLC 13146 NW 86th Drive Suite 400 Alachua, FL 32615 |
Date of Grant: 10/09/2026 Application Dated: 10/08/2026 |
| BYD Auto Industry Company Limited |
| No. 3001, 3007, Hengping Road, Pingshan, |
| Shenzhen, 518118 China |
| Attention: Gong liquan , Engineer |
| NOT TRANSFERABLE |
| EQUIPMENT AUTHORIZATION is hereby issued to the named GRANTEE, and is VALID ONLY for the equipment identified hereon for use under the Commission's Rules and Regulations listed below. |
| FCC IDENTIFIER: | SD4-K3CJ |
| Name of Grantee: | BYD Auto Industry Company Limited |
| Equipment Class: | Part 15 Low Power Communication Device Transmitter |
| Notes: | Smart Access Controller |
| Grant Notes | FCC Rule Parts | Frequency Range (MHZ) | Output Watts | Frequency Tolerance | Emission Designator |
| 15C | 13.56 - 13.56 |
| The device must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operated in conjunction with any other antenna or transmitter except in accordance with FCC multi-transmitter product procedures. |
TCB Grant - Application 6HtPsxPQhXw4NICsuEIjsw==
| TCB | GRANT OF EQUIPMENT AUTHORIZATION |
TCB |
| Certification | ||
| Issued Under the Authority of the | ||
| Federal Communications Commission | ||
| By: |
|
IIA Lab Services, LLC 13146 NW 86th Drive Suite 400 Alachua, FL 32615 |
Date of Grant: 10/09/2026 Application Dated: 10/09/2026 |
| BYD Auto Industry Company Limited |
| No. 3001, 3007, Hengping Road, Pingshan, |
| Shenzhen, 518118 China |
| Attention: Gong liquan , Engineer |
| NOT TRANSFERABLE |
| EQUIPMENT AUTHORIZATION is hereby issued to the named GRANTEE, and is VALID ONLY for the equipment identified hereon for use under the Commission's Rules and Regulations listed below. |
| FCC IDENTIFIER: | SD4-K3CJ |
| Name of Grantee: | BYD Auto Industry Company Limited |
| Equipment Class: | Digital Transmission System |
| Notes: | Smart Access Controller |
| Grant Notes | FCC Rule Parts | Frequency Range (MHZ) | Output Watts | Frequency Tolerance | Emission Designator |
| 15C | 2402.0 - 2480.0 | 0.00082 |
| Output Power listed is the maximum conducted output power. The device must be installed and operated so as to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter, except in accordance with FCC multi-transmitter product procedures, or as evaluated in this filing. End-users must be informed of operating requirements for satisfying RF exposure compliance. |