sliding & standing bluetooth keyboard case with back light for iphone4 &4s

Specification:
1. The ideal partner for your iPhone 4 & 4S.
2. Bluetooth Sliding Keyboard With Backlight for dark night use.
3. 0 to 90 degree adjustable stand up after slide out.
4. Elegant, easy to manage case with Soft-Touch surface protects your iPhone additionally.
5. Quick and easy installation via Bluetooth.
6. Integrated li-ion rechargeable battery for up to 25 days on standby or 8 hours continuous typing.
7. Use apple 30 pin port for charging, no need aditional charging cable.
8. Back light on automatically when you typing message or Email, and light off automatically 3 seconds without typing.