Type: Corded wireless headphones 400mA battery Driver Unit: 40 mm; Features: MIC, pause/play, and volume control Play time: 18 hours; steady by time: 100 hours Regularity Reaction: 20 Hz–20 KHz Length of cord: 1. 2 m 10% 3. 5 mm stereo plug as a connector Attenuity: 114 dab/mW Source of audio: communication devices