FCC ID SD4-MTD421-A1
In-vehicle Multimedia Host
by BYD Auto Industry Company Limited
Grantee Code: SD4 Product Code: MTD421A1
Latest application date: 2026-01-28
FCC ID Device Details
| FCC ID | SD4-MTD421-A1 |
|---|---|
| Mirrors | fcc.id | gov | fccid.ai |
| Grantee Code | SD4 |
| Product Code | MTD421A1 |
| Applicant Business | BYD Auto Industry Company Limited 🇨🇳 |
| Related Domains |  byd.com  fccusagent.com |
| Equipment Class | In-vehicle Multimedia Host |
| Test Firm | DEKRA Testing and Certification (Suzhou) Co., Ltd. |
Operating Frequencies
| Frequency Range | Application Purpose | Final Action Date |
|---|---|---|
| 2402-2480 MHz | Original Equipment | 2026-01-28 |
| 5745-5825 MHz | Original Equipment | 2026-01-28 |
| 2412-2462 MHz | Original Equipment | 2026-01-28 |
Exhibits
| Document | Type | Available | File |
|---|---|---|---|
| User Manual | Users Manual | 2026-07-27 | PDF 514.9 KB |
| Internal Photos | Internal Photos | 2026-07-27 | PDF 2.4 MB |
| External Photo | External Photos | 2026-07-27 | PDF 1,011.3 KB |
| Label | ID Label/Location Info | 2026-01-28 | PDF 196.5 KB |
| Test Setup Photos | Test Setup Photos | 2026-07-27 | PDF 935.7 KB |
| Antenna Report | Test Report | 2026-01-28 | PDF 754.4 KB |
| Test Report 2.4G WIFI_Part 1 | Test Report | 2026-01-28 | PDF 5.4 MB |
| Test Report 2.4G WIFI_Part 2 | Test Report | 2026-01-28 | PDF 5.4 MB |
| Test Report 2.4G WIFI_Part 3 | Test Report | 2026-01-28 | PDF 5.5 MB |
| Test Report 2.4G WIFI_Part 4 | Test Report | 2026-01-28 | PDF 5.5 MB |
| Test Report 2.4G WIFI_Part 5 | Test Report | 2026-01-28 | PDF 3.4 MB |
| Test Report 5G WIFI_Part 1 | Test Report | 2026-01-28 | PDF 5.4 MB |
| Test Report 5G WIFI_Part 2 | Test Report | 2026-01-28 | PDF 5.4 MB |
| Test Report 5G WIFI_Part 3 | Test Report | 2026-01-28 | PDF 5.4 MB |
| Test Report 5G WIFI_Part 4 | Test Report | 2026-01-28 | PDF 5.5 MB |
| Test Report 5G WIFI_Part 5 | Test Report | 2026-01-28 | PDF 5.4 MB |
| Test Report 5G WIFI_Part 6 | Test Report | 2026-01-28 | PDF 5.5 MB |
| Test Report 5G WIFI_Part 7 | Test Report | 2026-01-28 | PDF 5.3 MB |
| Test Report 5G WIFI_Part 8 | Test Report | 2026-01-28 | PDF 5.5 MB |
| Test Report 5G WIFI_Part 9 | Test Report | 2026-01-28 | PDF 950.9 KB |
| Test Report BLE_Part 1 | Test Report | 2026-01-28 | PDF 5.4 MB |
| Test Report BLE_Part 2 | Test Report | 2026-01-28 | PDF 5.4 MB |
| Test Report BT_Part 1 | Test Report | 2026-01-28 | PDF 5.4 MB |
| Test Report BT_Part 2 | Test Report | 2026-01-28 | PDF 5.5 MB |
| Test Report BT_Part 3 | Test Report | 2026-01-28 | PDF 5.3 MB |
| Test Report BT_Part 4 | Test Report | 2026-01-28 | PDF 1.7 MB |
| Attestation Statements-Kaspersky | Attestation Statements | 2026-01-28 | PDF 89.3 KB |
| Attestation Statements-Not Covered | Attestation Statements | 2026-01-28 | PDF 68.5 KB |
| US Agent | Attestation Statements | 2026-01-28 | PDF 159.5 KB |
| Confidentiality Request | Cover Letter(s) | 2026-01-28 | PDF 74.6 KB |
| POA | Cover Letter(s) | 2026-01-28 | PDF 68 KB |
| Software Configuration Control Declaration | Cover Letter(s) | 2026-01-28 | PDF 93.4 KB |
| RF Exposure | RF Exposure Info | 2026-01-28 | PDF 300.2 KB |
| Block Diagram Metadata only | Block Diagram | PDF 74.1 KB | |
| Schematics Metadata only | Schematics | PDF 3.4 MB | |
| Operation Description Metadata only | Operational Description | PDF 542.3 KB | |
| NII Security request Metadata only | SDR Software/Security Info. | PDF 172.4 KB |
Application Information
| Application ID | ganSETjdgI8VnWggllVvjw== |
|---|---|
| Final Action Date | 2026-01-28 |
| Application Purpose | Original Equipment |
| Applicant FRN | 0022593115 |
| Model | MTD421-A1 |
| Frequency Range | 2402-2480 MHz |
| Equipment Class | DSS - Part 15 Spread Spectrum Transmitter |
| Device Description | In-vehicle Multimedia Host |
| Responsible Party | Gong liquan, gong.liquan@byd.com , 13980278051 |
| Non-Technical Contact | Tim Payne, FCC US Agent, LLC, support@fccusagent.com , 7085713148 |
| Test Firm | Jennifer Jiang, DEKRA Testing and Certification (Suzhou) Co., Ltd., jennifer.jiang@dekra.com  , +86 512 6251 5088 |
| TCB Email | joe_chew@derycom-us.com  |
| TCB Scope | A4: UNII devices & low power transmitters using spread spectrum techniques |
| 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 |
|---|---|---|
| ganSETjdgI8VnWggllVvjw== | 2026-01-28 | Original Equipment |
| dOaxEmJESxg2B0nMPdpBhA== | 2026-01-28 | Original Equipment |
| P0j711v6ghQz6rvhZ5ZowA== | 2026-01-28 | Original Equipment |
Equipment Authorization
Grants
TCB Grant - Application P0j711v6ghQz6rvhZ5ZowA==
| TCB | GRANT OF EQUIPMENT AUTHORIZATION |
TCB |
| Certification | ||
| Issued Under the Authority of the | ||
| Federal Communications Commission | ||
| By: |
|
DERYCOM CERTIFICATION SERVICES, INC. 1100 Falcon Avenue Glencoe, MN 55336 |
Date of Grant: 01/28/2026 Application Dated: 01/28/2026 |
| 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-MTD421-A1 |
| Name of Grantee: | BYD Auto Industry Company Limited |
| Equipment Class: | Digital Transmission System |
| Notes: | In-vehicle Multimedia Host |
| Grant Notes | FCC Rule Parts | Frequency Range (MHZ) | Output Watts | Frequency Tolerance | Emission Designator |
| CC | 15C | 2402.0 - 2480.0 | 0.003 | ||
| CC | 15C | 2412.0 - 2462.0 | 0.064 |
| Output power listed is maximum conducted power. This device supports WLAN 802.11 b/g/n/a/ac/ax in SISO configurations with, where applicable, 20, 40 and 80MHz BW modes. The antenna used with this transmitter must be installed to provide a minimum 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. End-users must be provided with operating procedures for satisfying RF exposure compliance. |
| CC: | This device is certified pursuant to two different Part 15 rules sections. |
TCB Grant - Application ganSETjdgI8VnWggllVvjw==
| TCB | GRANT OF EQUIPMENT AUTHORIZATION |
TCB |
| Certification | ||
| Issued Under the Authority of the | ||
| Federal Communications Commission | ||
| By: |
|
DERYCOM CERTIFICATION SERVICES, INC. 1100 Falcon Avenue Glencoe, MN 55336 |
Date of Grant: 01/28/2026 Application Dated: 01/28/2026 |
| 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-MTD421-A1 |
| Name of Grantee: | BYD Auto Industry Company Limited |
| Equipment Class: | Part 15 Spread Spectrum Transmitter |
| Notes: | In-vehicle Multimedia Host |
| Grant Notes | FCC Rule Parts | Frequency Range (MHZ) | Output Watts | Frequency Tolerance | Emission Designator |
| CC | 15C | 2402.0 - 2480.0 | 0.009 |
| Output power listed is maximum conducted power. The antenna used with this transmitter must be installed to provide a minimum 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. End-users must be provided with operating procedures for satisfying RF exposure compliance. |
| CC: | This device is certified pursuant to two different Part 15 rules sections. |
TCB Grant - Application dOaxEmJESxg2B0nMPdpBhA==
| TCB | GRANT OF EQUIPMENT AUTHORIZATION |
TCB |
| Certification | ||
| Issued Under the Authority of the | ||
| Federal Communications Commission | ||
| By: |
|
DERYCOM CERTIFICATION SERVICES, INC. 1100 Falcon Avenue Glencoe, MN 55336 |
Date of Grant: 01/28/2026 Application Dated: 01/28/2026 |
| 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-MTD421-A1 |
| Name of Grantee: | BYD Auto Industry Company Limited |
| Equipment Class: | Unlicensed National Information Infrastructure TX |
| Notes: | In-vehicle Multimedia Host |
| Grant Notes | FCC Rule Parts | Frequency Range (MHZ) | Output Watts | Frequency Tolerance | Emission Designator |
| CC | 15E | 5180.0 - 5240.0 | 0.034 | ||
| CC ND | 15E | 5260.0 - 5320.0 | 0.046 | ||
| CC ND | 15E | 5500.0 - 5700.0 | 0.066 | ||
| CC | 15E | 5745.0 - 5825.0 | 0.051 |
| Output power listed is maximum conducted power. This device supports WLAN 802.11 b/g/n/a/ac/ax in SISO configurations with, where applicable, 20, 40 and 80MHz BW modes. For Dynamic Frequency Selection (DFS) relevant bands, the device operates as a client without radar detection only. The antenna used with this transmitter must be installed to provide a minimum 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. End-users must be provided with operating procedures for satisfying RF exposure compliance. |
| CC: | This device is certified pursuant to two different Part 15 rules sections. |
| ND: | This UNII device complies with the Transmit Power Control (TPC) and Dynamic Frequency Selection (DFS) requirements in Section 15.407(h). |