... around 5 years Specifications1.Support SD card,, USB MP3 music reading and playing,FM radio 2.External high-capacity lithium ... battery,contain LED indicator 3.Support USB interface 5v power supply, computer double track 3.5 audio input 4. Double ... ,elegant2,support format: MP3, WMA, Double decoding3,support External music broadcast equipment(AUX IN)connection,enjoy pleasure without restriction4,have ...