Output Power: 16W   Woofer: 4 inch

Frequency response: 40Hz-20KHz

Package: 1set/ctn   Power supply: DC5V

battery: 3.7V 2400mA 

Sony designFunction：4"x2/USB/TF/FM/bluetooth/wooferwith light/Mic input

with battery 3.7V2400mAProducts size: 395.65X165X179mm