Koss CS340BT QZ Wireless Bluetooth On-Ear Communication Headset, Active Noise Cancellation, On-Board Controls, Black

Features state of the are ANC (Active Noise Cancellation) Significantly reduces unwanted background noise so only high fidelity audio remains, Cancel Everything - Dual microphone CVC 8.0 eliminates background noise to provide crystal clear voice communication, On-Board Controls - Control ANC, volume and music as well as answer/end calls with the on-board controls, Impressive Battery Life - Up to 22 hours of use with ANC + Bluetooth or up to 30 hours of use with Bluetooth Only, One Year Limited Warranty