Bluetooth Version: V2.1Working Range: Up to 10m (about 33 feet)Working Time: 1-2 hoursCharging Time: 1~2 hoursBattery Charging Voltage: 5V±0.5VBattery Capacity: 520mAhLoudspeaker Output: 40mm 2.6ohm 3WInput power: DC 5VFrequency Response: 60Hz-18KHzS/N: ≥96dbDistortion: ≤0.5%Dimension: 60x60x53mmWeight: 230gColor: Black100% brand new and high qualityWith micro SD TF card slot， you can play mp3 / mp4 format files in the TF cardSupport 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/IPAD/Samsung Galaxy/Note/tablet， Laptop， Tablet PC， etcCompact and portable，convenient to carry