3.5mm PC VOIP Headset, Coodio 3.5mm Headphone [Volume Control] [Noise Cancelling] [Protein Earmuff] Binaural Headphone With Mic Microphone For PC Laptop Call Center Telephone Gaming Music - HS4 Hands-free, protein earmuff provide all day comfort. Boom-style noise cancelling microphone adjustable for optimum level Reversible for use with either ear, comfortable, lightweight design 4M long cord with volume control Excellent for use with VOIP, PC Gaming Chatting, Laptop Music, Call Center Service, Telephone Counseling Services, Insurance, Hospitals, Banks, Telecom Operators, Enterprises