The Plantronics Poly Voyager 4320 UC Wireless Headset frees you from your desk. It's everything you need to stay productive and connected to all your devices, whether at home or in the office. The long day of calls is made easier with all-day comfort and dual-mic Acoustic Fence technology that eliminates background noise. Audio Quality A noise-canceling dual mic with Acoustic Fence technology blocks out background noise in a flexible microphone boom. Flexible Convenience It features an online light indicator to let others know when you are on a call. Use as a wireless headset with up to 24 hours of talk time or as a corded headset with USB headset mode and audio over USB. Comfort Designed for comfort with an adjustable, enhanced padded headband and memory foam ear cushions for passive noise isolation. Compatibility It can be connected to a computer via a BT700 Bluetooth adapter or to a mobile device via Bluetooth 5.2. Optional Voyager Office Base (sold separately) is required to connect to a desk phone and computer. Use at Home or in the Office This headset is ideal for professionals working from home, in an open office, or both.