Compucessory Stereo Headset w/ Volume Control, Dark gray Connectivity Technology: Wired, Earpiece Controls: Volume, Earpiece Design: Over-the-head, Earpiece Technology: Dynamic, Earpiece Type: Binaural, Form Factor: Ear-cup, Host Interface: Mini-phone, Maximum Frequency Response: 20kHz, Minimum Frequency Response: 20Hz, Operating Distance: 8.5ft, Product Model: CCS 55230, Sound Mode: Stereo Sold as 1 each