Plantronics 85619-101 Black Wire C320,M , Wired Headset , On- Ear , Gray Lightweight metal headband offers durability and a customizable, comfortable fit Intuitive inline controls to answer/end calls, control volume, and mute Smartly placed indicator lights and helpful audio alerts give user call, mute, and volume status Wideband audio with noise-canceling for high-quality PC telephony Dynamic EQ feature automatically adjusts audio for voice or multimedia use