Blue tooth speaker,Support for bluetooth audio playback,Support 3.5 stereo audio input,Battery capacity: 1500 mAh,Charging interface: MICRO USB (input voltage range 4.5 V-6.5 V),Stereo speakers specification: 3 W * 2 (THD + N Max 10%),Line_IN input reference level: to the ipad 1 KHZ0DB signal for the biggest volume reference, output 3 W/CH