Plantronics BackBeat Pro - Noise Canceling headpohnes, over-ear design, Acive Noice Canceling, upt to 24 h running time with just one charge process, up to 100 meters range (bluetooth class 1), OpenMic feature for control ambient noise, Power-saving features - automatically pausing the streaming audio and ANC when you slip off your headphones and an out-of range hibernation mode, removable cabel with remote control (Apple compatible), frequency response: 20 - 20000 Hz, weight: 340 g, includes USB charging cable and etui