Mini portable size, bluetooth system, rechargable Li-on battery Technical Specification RMS2.5W + 2.5W = 5WDrivers1.5” Full Range x 2Distortion0. 5%@1WSeparation≥40dB ... Length---Function SpecBluetooth(A2DP,AVRCP,HFP,HSP), VOL+/-, POWER,AUX IN,Play/Pause, Prev&Next, Call control,Li-ion BatteryN.W ...