1. Built-in Bluetooth wireless transmission, support calls handsfree function. 2. Support playing MP3 songs stored in the USB disk 3. Support playing MP3 songs stored in the TF card 4. Support external 3.5mm audio input terminals of all. 5. Support FM automatic station search. 6. Rechargeable. The best sound quality:3D surround sound 7. Bluetooth 3.0 version with distance of up to 15-20m 8. Support Portable Multifunction Bluetooth speaker