Yealink BH71 Pro USB-C Headset, Carrying Case w/ Built-In Battery (+20hrs), USB-C to USB-A Cable, 10H Talk Time, 3 Size Ear Plugs Microsoft Certified Teams Mono Bluetooth Wireless Headset • for hybrid work Headset part: • Color: Black • Weights: 18g • 4 mic beamforming noise cancellation • Addjustable ear hook • Talk time: (up to) 10h • Bluetooth：5.2 • 3 different size earplugs • Support Yealink Connect APP and Yealink USB Connect Manager Charging case (with built-in battery) • 20h extra headset talk time by charging case • Support Yealink Connect APP and Yealink USB Connect Manager • USB C Bluetooth dongle • USB 2.0 Cable : USB-C to USB-C Connection: • PC • Mobile phone