Built-in TF / micro SD card slot supports up to 32 GB TF / micro SD card (card is not included). Just store all your music on a TF / micro SD card and then play them off with this sports player. Supports MP3 and WMA music format.
Built-in rechargeable lithium-ion battery and it is charged via the included USB cable. Easy to use, "On / Off" and 3 Keys: Play / Pause, Volume + / - (long press), Previous / Next (press briefly).
Comfortable and safe: cyclist, runners, joggers, walkers, etc. And thanks to the great quality and the superstar sound you can simultaneously exercise and listen to your own music!