Bluetooth 3.0 +EDR  A2DP  315x 160 x125mm 376 x 206 x 131mm Output power 10W ( RMS ) : Class D Ampli?er 5W  +5W Speaker Driver : Full Range : 3" x 2 + Passive Radiator PLL Auto Digital Tuning with LED Display Bluetooth Range : line sight , 10 M Build in Lithium rechargeable battery USB Host 5V  Charging Audio Connections : 3.5 mm stereo line in . Optional : USB mp3 ,  AC/DC adaptor