Type: Wireless headphone (with cord) Battery: 400mADriver Unit: 40 mm Function: volume control, pause/ Play device, MIC unction Stead by time: 100 hours Play time: 18 hours Frequency Response: 20 Hz-20KHz Cord length: 1. 2 m+10% Connector: 3. 5 mm stereo plug Sensitivity: 114dab/mW Audio source: communication equipment