... gen mp3 player,square shape with clip.Concise, delicate, fashion. 2, Support mp3,wma music format. 3, can use to be TF card reader ... dish function. 5, USB1.1/2.0 interface, the support hot swaps.7, without external power supply 8, can use on many operation ... :Yep, We use good original flash,good battery for mp3 mp4 products.Ensure that it more stability,and check the products ...