... flash disk, MP3 songs or data stored anywhere. 4. Built-in rechargeable lithium battery, beautiful music, sound, perfect music to enjoy ... to MP3 and mobile storage disk function. 7, Built-in high-energy rechargeable batteries. 8, stylish compact size, design, exquisite workmanship ... MP3/WMA / and other audio formats, which will contain songs in the TF card into the machine, press the play button ...