The Poly Voyager 4220 Office (V4220 CD / USB-A) is a wireless Bluetooth stereo headset system featuring a desktop charging/connectivity base and a USB-A cable. It is built for professional office environments, offering dual-ear HD sound and multi-device connectivity for desk phones, computers, and mobile phones.Key Features

• Connectivity: Connects to your desk phone and your PC/Mac via the USB-A base or directly to mobile devices via Bluetooth.
• Audio Style: Binaural (stereo / dual-ear) over-the-head design with soft leatherette cushions.
• Microphone: Dual-microphone noise-canceling boom arm to minimize background office chatter.
• Wireless Range: Roam up to 300 feet (91 meters) line-of-sight from the base.
• Battery Life: Up to 12 hours of talk time and 15 hours of listening time on a full charge.
• Indicators: Built-in on-call indicator light (busy light) on the earcup to alert coworkers when you are on a call.