The comfortable and user friendly Plantronics Blackwire C310 is a monaural headset featuring simple inline controls to allow you to answer and end calls at the click of a button. The adjustable lightweight metal headband makes this a durable and comfortable headset and the exclusive Dynamic EQ automatically adjusts settings to provide an exceptional sound quality. A noise cancelling microphone filters out background noise for increased intelligibility so you can ensure your message is always received. The C310 UC model is designed for a wide range of Unified Communicator (UC) applications.