POLY Voyager 4310 UC Monaural Headset +BT700 USB-A Adapter +Charging Stand

Product type: Headset. Connectivity technology: Wireless, Bluetooth. Headphone frequency: 20 - 20000 Hz. Wireless range: 50 m. Cable length: 1.5 m. Weight: 122 g. Product colour: Black.

eBay