Main features:  
1)support mp3/wma format
2)built-in rechargeable lithium battery 
3)high speed USB 2.0, plug and play
4)can be used as a flash drive
5)capacity:512Mb,1GB,2GB,4GB

Packing details: 
1PC/1 crystal box,100PCS/Carton 
N.W.: 11KG/Carton 
G.W.: 12KG/Carton 
Carton size: 45 x 34 x 25.2cm