Workers in & out of the office need a Bluetooth headset that moves with them. Poly Voyager 5200 Office Headset sounds professional in any environment whether connected to a desk phone, PC or mobile device. Distraction-free calling features six layers of WindSmart technology, four omnidirectional mics & Digital Signal Processors (DSP) to reduce distracting background noise. Smart sensors know when you're wearing your headset or not. Answer calls by simply putting on the headset. Pause music for incoming calls or mute a call by taking the headset off. It also announces the names of incoming callers & waits for you to say “answer” or "ignore." Charge lasts up to 7 hours of talk time & up to 9 days of standby time. Customize your personal Poly device with the powerful desktop or web-based Poly Lens app. Set audio settings for each device based on your work style. USB-A base connects to your desk phone via telephone interface or EHS cable.