Features: 1.Bluetooth 3.0 for all of your devices with built-in Bluetooth function. 2.Hands-free function. When it's in Bluetooth Mode click the phone button once to answer incoming calls. 3.You can insert TF card to play music plug and play; Currently it supports MP3 format audio file playback. 4.Supports TF card mode data transfer up to 64GB card reader function. 5.2-in-1 function cable. The equipped USB cable can be used for battery recharge and data transfer. 6. With built-in rechargeable battery 7. Supports a key to answer function 8. Produce high-fidelity sound effect 9. Quick frequency response range 10. Adopts advanced electronic components 11. Designed with silk tweeter system 12. Gives you extraordinary audio experience