Texture: Silicone+ABS + TPE+ metal shell Wireless Version: V5.3 Average battery life: ~25H Battery Capacity: 170mAh Impedance: >1MΩ Frequency Range: 20Hz~20KHz Rated Power: 10mW Driver Element: 14.2mm Input: DC5V-200mA Stand-by Time: ~160H Time For Charging: ~1-2H