Akai Flat Cable In Ear Headphones with Mic and Volume Control built in microphone built in volume control 1.3m 3.5mm AUX cable driver: 11mm impedance: 32ohms frequency response: 18Hz-20kHz sensitivity: 116+-3dB at 1KHz 0.5 RMS rated power: 5mW Akai Flat Cable In Ear Headphones with Mic and Volume Control A58010