Behringer Bc11 - Headphone Cable with In-Line Microphone, 3.5 mm TRS to 3.5 mm TRRS, built-in music control switch to play/pause and change tracks, noice cancelling microphone, Frequency response: 50 Hz to 10 kHz, omnidirectional, Sensitivity -43 dB, ± 3 dB @ 1 kHz (1V/Pa), gold-plated connectors, braided cable, length: 2 m