... 3W*2 Voltage: 5v Drive Units: 4@*2 With USB/SD card reader Frequency: 20Hz-20KHz Dimensions(mm): W170*H300*D140 ... Have radio function, with USB/SD card reader Function switch; 1. Remote Window 2. USB ... Next /FM channel+ 6. EQ Model key 7. USB 8. SD * Packing Content: Speaker, ,remote control,USB Power Cord,2.5mm ... *Packing: each in a clamshell,pcs in a carton* G.W.:* Carton size:CM