Microsoft Certified Teams USB Wired Headset Dual Noise-Canceling. Visible Busylight. Dual Devices Connection. Built-in Battery. Built-in Bluetooth 5.1. Call and Music Mode. QUICK SPECIFICATIONS Product Type: Headset Earpiece Type: Stereo Talk time: up to 7 hours ?9 hours with busylight off? Music time: 14 hours Battery capacity: 200 mAh