Be in contact clearly as much as 350 feet away out of your desk with the CS510 Monaural Wireless Headset from Plantronics. Designed to connect with your desk phone, the CS510 sports a graceful, lightweight design and has been comfort-tested. One-touch controls at the headset permit you to answer or end calls and adjust or mute the quantity. The system also allows you to conference in as much as three additional headsets for more uncomplicated collaboration. The headset offers as much as nine hours of talk time and is designed to be worn over-the-head.