... Distortion rate:5% less( the specification for the speaker can be customised according to your requested)Input and ... outputUSB 5PPower and batteryBuilt in 300mahLithium battery,speaker working time: 2-4hour,Can charger by Power ... functionCould connect with Computer,Phone,,MP3 ,MP4, Tablet PC, Bluetooth wireless receiver, etc. to work, easy portable .Packing detailsColor ...