Built in rechargeable lithium polymer battery.Support standard USB/DC， TF card and AUX.Digital power amplifier.With red/blue LED indicator.Bluetooth version: V3.0.Output power: 3W×2.Battery charging voltage:DC5V.Charging time: 5-6hrs.Playing time: 3-4 hrs.Portable， compact and beautiful outlook.100% Brand new.Suitable for:Cell phone， PC and devices with Bluetooth function.House， office， car and outdoor in the park etc.Package Includes:1 x Bluetooth speaker.1 x USB charger cable.1 x 3.5mm audio cable.