Bluetooth headphones with microphone Defender B520 FreeMotion
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| Design: | Invoices |
| Description: | Design: overhead, design features: microphone, case charging type: micro USB, type of acoustic design: closed |
| Sensitivity: | 100 dB |
| Design features: | Microphone |
| Mount type: | Headband |
| Bluetooth version: | 4.2 |
| Membrane diameter: | 40 mm |
| Type of acoustic design: | Closed |
| Wireless connection type: | Bluetooth |
| Case charging type: | micro USB |