Poly Blackwire C3215 Headset - Mono - Mini-phone (3.5mm), USB Type A - Wired - 32 Ohm - 20 Hz - 20 kHz - Over-the-head, Over-the-ear - Monaural -...

Poly Blackwire C3215 Headset - Mono - Mini-phone (3.5mm), USB Type A - Wired - 32 Ohm - 20 Hz - 20 kHz - Over-the-head, Over-the-ear - Monaural - Supra-aural - 7.40 ft Cable - Noise Cancelling Microph Type: Over-the-head,Over-the-ear