Bluetooth 3.0 +EDR  A2DP   285 x 120 x 120mm 290 x125 x125mm Output power 15W ( RMS ) Class D Ampli?er 2.5W  +2.5W +10W Tweeter  : 1.5" x 2 , Woofer : 5.25" x 1 Bluetooth Range : line sight , 10 M Build in Lithium rechargeable battery USB Host 5V  Charging Audio Connections : 3.5 mm stereo line in . Optional :  AC/DC adaptor