Plantronics .Audio 345 Multimedia Headset, Behind-the-Head, Black/Silver Connectivity Technology: Wired, Earpiece Controls: Volume, Earpiece Design: Behind-the-neck, Earpiece Type: Binaural, Form Factor: Semi-open, Microphone Controls: Mute, Microphone Design: Boom, Microphone Technology: Noise Canceling, Product Model: .Audio 345, Product Series: .Audio, Sound Mode: Stereo, Standard Warranty: 1 Year Sold as 1 each