Features:Super Bass SpeakerBuilt-in lithium battery 100% brand new and high qualityWith USB And micro SD/ TF card slot， you can play mp3 / mp4 format files in the TF card Support A2DP， AVRCP， headset， handsfree profileWireless portable mini Bluetooth stereo speaker systemSaves you from the hassle of tangled wiresBuilt in rechargeable battery ， charged by computer via USB interfaceThis model of speaker supports any mobile device comes with Bluetooth function such as For IPHONE， For IPAD， Samsung Galaxy/Note/tablet， Laptop， Tablet PC， etcCompact and portable， convenient to carry and use it indoor or outdoorSpecification:Bluetooth Version: V3.0Working Range: Up to 10m (about 33 feet)Working Time: 1-2 hoursCharging Time: 1~2 hoursBattery Charging Voltage: 5V??0.5VBattery Capacity: 500mAhLoudspeaker Output: 40mm 2.6ohm 3WInput power: DC 5VFrequency Response: 60Hz-18KHzS/N: ??96dbDistortion: ??0.5%Dimension: 145x45x45mmWeight: 215g