K521B Wireless earphones Test Report - FCC ID 2AVJD-K521B
FCC ID 2AVJD-K521B
Appendix A RF Test Data for BT_Part1
Wireless earphones
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Document Details
| FCC ID | 2AVJD-K521B |
|---|---|
| Document ID | 8816375 |
| Document Type | Test Report |
| Description | Appendix A RF Test Data for BT_Part1 |
| Applicant | Shenzhen Ruianyuan Electronic Technology Co., Ltd. |
| Equipment Class | Wireless earphones |
| Product Code | K521B |
| Application ID | 2Hdma5vNLlJtBcs+9GZ1AQ== |
| Application Purpose | Original Equipment |
| Application Date | 2025-11-27 |
| Frequency Range | 2402-2480 MHz |
| FRN | 0029089190 |
| Test Firm | Dongguan Yaxu (AiT) Technology Limited |
| Certified By | Meizhen Lin Manager |
| Short-Term Confidentiality | No |
| Long-Term Confidentiality | No |
| Modular Equipment | Does not apply |
| Composite Device | No |
| Submitted | 2025-11-27 |
| Available | 2025-11-27 |
| Created | 2025-09-25 |
| Modified | 2025-11-26 |
| Pages | 37 |
| File Type | Adobe Acrobat PDF |
| File Size | 6240563 |
| File SHA-256 | 08ee3e34b72623707db7e2b6dd9019b3650a5ab8f8ee7f2772d03c3e10580b5d |
| PDF Metadata Author | WCB |
| PDF Metadata Producer | WCB, WCB |
| FCC.gov Sources | FCC.gov 8816375 |
Related FCC Exhibits
| Document | Type | Available | File |
|---|---|---|---|
| User Manual | Users Manual | 2025-11-27 | PDF 1.8 MB |
| Internal Photos | Internal Photos | 2025-11-27 | PDF 4 MB |
| External Photos | External Photos | 2025-11-27 | PDF 2.6 MB |
| FCC ID Label | ID Label/Location Info | 2025-11-27 | PDF 84.1 KB |
| Test Setup Photos | Test Setup Photos | 2025-11-27 | PDF 1.5 MB |
| AiTDG-250829001W1_Test Report-BT | Test Report | 2025-11-27 | PDF 974.2 KB |
| Antenna Specification | Test Report | 2025-11-27 | PDF 845.5 KB |
| Appendix A RF Test Data for BT_Part1 | Test Report | 2025-11-27 | PDF 6 MB |
| Appendix A RF Test Data for BT_Part2 | Test Report | 2025-11-27 | PDF 5.9 MB |
| 2AVJD-K521B US_Agent | Attestation Statements | 2025-11-27 | PDF 146.8 KB |
| USA-CoveredEquipmentLetter-Combined_V1.1 | Attestation Statements | 2025-11-27 | PDF 123.8 KB |
| FCC Declaration Letter TWS left&Right | Cover Letter(s) | 2025-11-27 | PDF 81.3 KB |
| USA-ConfidentialityRequestLetter_V0.1 | Cover Letter(s) | 2025-11-27 | PDF 103.6 KB |
| AiTDG-250829001W2_FCC RF EXPOSURE 0cm | RF Exposure Info | 2025-11-27 | PDF 326 KB |
| Block Diagram Metadata only | Block Diagram | PDF 45.6 KB | |
| Schematic Metadata only | Schematics | PDF 261.7 KB | |
| Operation Description Metadata only | Operational Description | PDF 158.9 KB | |
| USA-DueDigilenceLetter_V0.1 Metadata only | Operational Description | PDF 87.1 KB |