POLY Voyager 4310 UC Monaural Headset +BT700 USB-A Adapter +Charging Stand. Product type: Headset. Connectivity technology: Wireless, Bluetooth. Recommended usage: Office/Call center. Headphone frequency: 20 - 20000 Hz. Wireless range: 1968.5" (50 m). Cable length: 59.1" (1.5 m). Weight: 4.3 oz (122 g). Product color: Black