Features:Bluetooth autodyneSuper 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 USB Flash Disk /TF card Support A2DP， AVRCP， headset， handsfree profileWireless portable mini Bluetooth stereo speaker systemSaves you from the hassle of tangled wiresExpanded BXS (Bass Xpansion System) drives a fuller， richer low-end responseBuilt in rechargeable battery ， charged by computer via USB interfaceModular 'Buddy-jack' design: connect a row of Mini Speakers to get jaw-dropping audio performanceThis 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 outdoor.Specification:Bluetooth Version: V2.1Working Range: Up to 10m (about 33 feet)Working Time: 1-2 hoursCharging Time: 3 hoursBattery Charging Voltage: 5V��0.5VBattery Capacity: 500mAhLoudspeaker Output: 40mm 2.6ohm 3WInput power: DC 5VFrequency Response: 150Hz-18KHzS/N: ��96dbDistortion: ��0.5%Dimension: 80*80*80mmWeight: 370