Plantronics Blackwire 3300 Series Corded UC Headset - Mono - Mini-phone (3.5mm), USB Type A - Wired - 32 Ohm - 20 Hz - 20 kHz - Over-the-head - Monaural - Supra-aural - Noise Cancelling Microphone

Your voice will be heard loud and clear with the boom microphone These supra-aural Blackwire give you the comfort of portability Great for Audio/Visual Labs, Assisted Listening Systems and more that have a Mono jack for non-stereo use Hear low subs and soaring vocals with a frequency range of sound from 20 Hz-20 kHz