Product Features

Stereo speaker with built-in battery and vibration for iPhone
Good for Game and Music. Use it like Sony PSP or Nintendo.
Compatible with iPhone 3G, 3GS, 4
Size ; 159 mm x 69 mm x 19 mm
Charging time 4 hours, Calling time 10 hours, Music play 50 hours

Technical Details

3 different vibration mode
powerful stereo sound
good for extended battery pack
easy to operate
good for game and music