FCC ID L76-TWS250I
Bluetooth True Wireless Earbuds
by Koss Corporation
Grantee Code: L76 Product Code: TWS250I
Latest application date: 2021-04-01
FCC ID Device Details
Operating Frequencies
| Frequency Range | Application Purpose | Final Action Date |
|---|---|---|
| 2402-2480 MHz | Original Equipment | 2021-04-01 |
Exhibits
| Document | Type | Available | File |
|---|---|---|---|
| Internal Photos | Users Manual | 2021-09-18 | PDF 1.7 MB |
| User Manual of TWS250i | Users Manual | 2021-09-18 | PDF 5.2 MB |
| Internal Photos | Internal Photos | 2021-09-18 | PDF 1.7 MB |
| External Photos | External Photos | 2021-09-18 | PDF 993.7 KB |
| Label and location of HKTWS158 | ID Label/Location Info | 2021-04-01 | PDF 627.9 KB |
| Label and location of TWS250i | ID Label/Location Info | 2021-04-01 | PDF 590 KB |
| Test Setup Photos | Test Setup Photos | 2021-09-18 | PDF 282.3 KB |
| Test Report | Test Report | 2021-04-01 | PDF 4.5 MB |
| Declaration Letter for Model Differences | Cover Letter(s) | 2021-04-01 | PDF 113 KB |
| FCC Confidentiality Letter | Cover Letter(s) | 2021-04-01 | PDF 69.2 KB |
| Product Identical Declaration Letter | Cover Letter(s) | 2021-04-01 | PDF 55.7 KB |
| RF Exposure Info | RF Exposure Info | 2021-04-01 | PDF 82.7 KB |
| Block Diagram Metadata only | Block Diagram | PDF 11.8 KB | |
| PCB Layout Part 1 Metadata only | Schematics | PDF 249.1 KB | |
| PCB Layout Part 2 Metadata only | Schematics | PDF 249.1 KB | |
| Schematic Metadata only | Schematics | PDF 28.9 KB | |
| Operational Description Metadata only | Operational Description | PDF 173.1 KB | |
| Parts List Part 1 Metadata only | Parts List/Tune Up Info | PDF 97.3 KB | |
| Parts List Part 2 Metadata only | Parts List/Tune Up Info | PDF 97.8 KB |
Application Information
| Application ID | vOHzY881bcxGlcAfbWTi5w== |
|---|---|
| Final Action Date | 2021-04-01 |
| Application Purpose | Original Equipment |
| Applicant FRN | 0014837306 |
| Model | TWS250I |
| Frequency Range | 2402-2480 MHz |
| Equipment Class | DSS - Part 15 Spread Spectrum Transmitter |
| Device Description | Bluetooth True Wireless Earbuds |
| Responsible Party | Benton Geimer, Electroacoustic Engineer, bgeimer@koss.com  , 4149671518 |
| Test Firm | Harry Zhou, TUV SUD Cert & Testing (China) Co., Ltd., harry.zhou@tuv-sud.cn  , 86 755 3332 3281 |
| TCB Email | allen.ferry@babt.com  |
| TCB Scope | A4: UNII devices & low power transmitters using spread spectrum techniques |
| Short-Term Confidentiality | Yes |
| Short-Term Confidentiality Date | 09/18/2021 |
| Long-Term Confidentiality | Yes |
| Grant Deferral | No |
| Modular Equipment | Does not apply |
| Composite Device | No |
| Composite Part | No |
| Cognitive Radio | No |
| Authorization Waiver | No |
| Authorization Waiver Approved | No |
| Section 5301 Certification | Yes |
| Related OET Knowledge DataBase Inquiry | No |
| Grant Comments | Output power is peak conducted. |
Applications
| Application ID | Date | Purpose |
|---|---|---|
| vOHzY881bcxGlcAfbWTi5w== | 2021-04-01 | Original Equipment |
Equipment Authorization
| Frequency | Output | Rules |
|---|---|---|
| 2402-2480 MHz | 0.0030800 | 15C |
Grants
TCB Grant - Application vOHzY881bcxGlcAfbWTi5w==
| TCB | GRANT OF EQUIPMENT AUTHORIZATION |
TCB |
| Certification | ||
| Issued Under the Authority of the | ||
| Federal Communications Commission | ||
| By: |
|
TUV SUD BABT UNLIMITED Octagon House, Concorde Way Segensworth North Fareham, PO15 5RL United Kingdom |
Date of Grant: 04/01/2021 Application Dated: 03/22/2021 |
| Koss Corporation |
| 4129 N. Port Washington Avenue |
| Milwaukee, WI 53212 |
| Attention: Benton Geimer , Electroacoustic 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: | L76-TWS250I |
| Name of Grantee: | Koss Corporation |
| Equipment Class: | Part 15 Spread Spectrum Transmitter |
| Notes: | Bluetooth True Wireless Earbuds |
| Grant Notes | FCC Rule Parts | Frequency Range (MHZ) | Output Watts | Frequency Tolerance | Emission Designator |
| 15C | 2402.0 - 2480.0 | 0.00308 |
| Output power is peak conducted. |
EAS Grant - Application vOHzY881bcxGlcAfbWTi5w==
| COPY |
FEDERAL COMMUNICATIONS COMMISSION WASHINGTON, D.C. 20554 GRANT OF EQUIPMENT AUTHORIZATION |
COPY |
| Certification |
|
Koss Corporation 4129 N. Port Washington Avenue Milwaukee, WI 53212 United States |
Date of Grant: 04/01/2021 Application Dated: 03/22/2021 |
| Attention: Benton Geimer , Electroacoustic 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: | L76-TWS250I |
| Name of Grantee: | Koss Corporation |
| Equipment Class: | Part 15 Spread Spectrum Transmitter |
| Notes: | Bluetooth True Wireless Earbuds |
| Modular Type: | Does not apply |
| Grant Notes | FCC Rule Parts | Frequency Range (MHZ) | Output Watts | Frequency Tolerance | Emission Designator |
| 15C | 2402.0 - 2480.0 | 0.00308 |
| Output power is peak conducted. |
| Mail To: |