Waterproof Rating:Can play underwater 10m to 180 minutes, accord with IPX7    

waterproof standard of check   levelSupport max. 10 meters under water 
 Built-in Memory: 2GB -4GB
Support Music Format: MP3, WMA
Via computer USB2.0 port to download music files 
Support Systems: Windows 98SE/ME/2000/XP/Vista, Mac OS 8.6 or later 
Built-in rechargeable Li-ion battery (charged via USB port) 
Control key functions : Forward, Back, Play/Pause, Volume Up, Volume Down 
Box package, good for gift 
Item Specification

Built-in Li-ion battery, directly connect with PC for re-charging 
Built-in internal 2GB flash memory  
For 2GB flash memory. Stores up to 520 songs 
Support audio file format : MP3 or WMA files 
A standard 3.5mm headphones jack 
MP3 length: 5.5cm
MP3 net weight: 11g

Weight : 25g
Dimension : 1.99x0.94x0.31 inches

Accessories:

1 x 2GB Water proof IPX8 Mp3 Player
1x Earphone Headset
1x USB connection cable
1x Carrying case
1x English Manual
Retail packing box