Mini portable size, bluetooth system, rechargable Li-on battery Technical Specification RMS2.5W + 2. ... D56mmInput /OutputSTEREO / --Satellite Line Length---Function SpecBluetooth(A2DP,AVRCP,HFP,HSP), VOL+/-, POWER,AUX IN,Play/Pause, Prev&Next, Call control,Li-ion BatteryN ...