Product description:
With micro SD TF card slot, you can play mp3 / mp4 format files in the TF card; Support A2DP, AVRCP, headset, handsfree profile; wireless portable mini Bluetooth stereo speaker system; saves you from the hassle of tangled wires; expanded BXS (Bass Xpansion System) drives a fuller, richer low-end response; built in rechargeable battery, charged by computer via USB interface.