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| Company | Code |
|---|---|
| Koss Corporation | 10021A |
| IC ID | App # | Model | Date |
|---|---|---|---|
| 10021A-BT540I | 180243 | BT540i | 2014-11-14 |
| 10021A-BT540I | 175401 | BT540i | 2014-04-28 |
| 10021A-BTS1 | 175200 | BTS1 | 2014-04-07 |
| 10021A-TAP | 156956 | STRIVA TAP | 2012-05-30 |
| 10021A-CAP | 156949 | STRIVA CAP | 2012-05-29 |
| 10021A-PRO | 156856 | STRIVA PRO | 2012-05-28 |
| 10021A-BT0001 | BT221i / KOSS BT221i / N/A | 2018-03-08 | |
| 10021A-PORTAPROBT | Koss Porta Pro Wireless / Koss Porta Pro Headset / -- | 2018-01-04 | |
| 10021A-BT190I | BT190i / Bluetooth Headset / N/A | 2016-12-15 | |
| 10021A-BT539I | BT539i / Bluetooth Headset / N/A | 2016-05-09 | |
| 10021A-BT539I | BT539i / Bluetooth Headset / N/A | 2016-05-09 | |
| 10021A-BT539I | BT539i / Bluetooth Headset / N/A | 2016-05-09 | |
| 10021A-BT540I | BT540i / -- / -- | 2014-11-14 | |
| 10021A-BT540I | BT540i / -- / -- | 2014-11-14 | |
| 10021A-BT540I | BT540i / -- / -- | 2014-11-14 | |
| 10021A-BT540I | BT540i / -- / -- | 2014-04-28 | |
| 10021A-BT540I | BT540i / -- / -- | 2014-04-28 | |
| 10021A-BT540I | BT540i / -- / -- | 2014-04-28 | |
| 10021A-BTS1 | BTS1 / -- / -- | 2014-04-07 | |
| 10021A-BTS1 | BTS1 / -- / -- | 2014-04-07 | |
| 10021A-BTS1 | BTS1 / -- / -- | 2014-04-07 | |
| 10021A-TAP | STRIVA TAP / -- / -- | 2012-05-30 | |
| 10021A-TAP | STRIVA TAP / -- / -- | 2012-05-30 | |
| 10021A-TAP | STRIVA TAP / -- / -- | 2012-05-30 | |
| 10021A-CAP | STRIVA CAP / -- / -- | 2012-05-29 | |
| 10021A-CAP | STRIVA CAP / -- / -- | 2012-05-29 | |
| 10021A-CAP | STRIVA CAP / -- / -- | 2012-05-29 | |
| 10021A-PRO | STRIVA PRO / -- / -- | 2012-05-28 | |
| 10021A-PRO | STRIVA PRO / -- / -- | 2012-05-28 | |
| 10021A-PRO | STRIVA PRO / -- / -- | 2012-05-28 |