Channels：1 Special Feature：PORTABLE type：hi tech speakers Function：BT/USB/SD/Radion/Wireless Mic/Remote Control Speaker unit：2*2"+6.5" Output power：40 Battery：12V/2.6A, working time:6H,charging time 7H Usage：outdoor speaker for party,shopping place,outdoor activities IC：4 IC imported from Japan Package carton package. Transformer：100% pure copper wire Adaptable voltage：110V,100V/220V,100-240V,220V,230V
