... battery *fm radio mp3 player *mp3 radio player *mp3 with speaker FM radio mp3 playermp3 radio player, mp3 music player2G,4G,8G,16G for option,Free ... custom your logo :) Description: 1,OLED color display, support MP3, WMA, music files and so on; 2,FM stereo radio ... .Otherwise it will extremely easily caused the built-in lithium battery failure and damage. 3.Pls don't care the Rechargeable ...