Type: Wireless headphone (with cord) Battery: 400mADriver Unit: 40 mm Function: volume control, pause, Play device, MIC unction Stead by time: 100 hours It adopts 40mm-HiFi dynamic coil speaker with high dynamic sensitivity, high fidelity and other characteristics. Support AAC/SBC advanced audio decoding mode, enjoy the professional-grade music sense of bass, thick and boring / medium-frequency level clear / high-pitched. 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