REMAX TWS-21 black
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| Design: | Intracanal |
| Product color: | Black |
| Description: | Design: in-ear, device type: TWS wireless headphones, design features: microphone |
| Battery capacity: | 40 mAh |
| Standby time: | 90 h |
| Talk Time: | 45 h |
| Sensitivity: | 97 dB |
| Design features: | Microphone |
| Charging time: | 1.5 h |
| Device type: | Wireless tws earphones |
| Mount type: | Without attachment |
| Maximum playback frequency: | 20000 Hz |
| Minimum repeatable frequency: | 20 Hz |
| Bluetooth version: | 5.0 |
| Wireless connection type: | Bluetooth |