Support A2DP， AVRCP， headset， handsfree profile Bluetooth Version: V2.1 Working Range: Up to 10m (about 33 feet) Working Time: up to 5 hours Charging Time:1~2 hours Battery Charging Voltage: 5V±0.5V Battery Capacity: 520mAh Loudspeaker Output: 40mm 2.6ohm 3W Input power: DC 5V Frequency Response: 60Hz-18KHz S/N:≥96db Distortion:≤0.5% Dimension:60*60*53mm Weight:230g * With micro SD TF card slot， you can play mp3 / mp4 format files in the TF card. * Wireless portable mini Bluetooth stereo speaker system. * Saves you from the hassle of tangled wires. * This model of speaker supports any mobile device comes with Bluetooth function such as IPHONE， IPAD， Samsung Galaxy/Note/tablet， Laptop， Tablet PC， etc. * Expanded BXS (Bass Xpansion System) drives a fuller， richer low-end response * Built in rechargeable battery ， charged by computer via USB interface. * Compact and portable，convenient to carry.Package: 1 x Bluetooth Speaker (with retail packaging)