The cradle is designed to hold the device securely with the connections on the back and side of the base section to allow the charger and a 3.5mm jack to be plugged in. This cradle is designed specifically for the 8.9 tablet and will hold it securely allowing it to charge and be used/viewed (power required for charging).
This is a full Qwerty keyboard with extra keys to allow you to easily access key features and functions of your device. The keys themselves are responsive and give excellent feedback when pressed.
On the rear and side of the keyboard is a 30pin connector and a 3.5mm jack socket. The 30pin connector is used to charge the tablet when installed in the cradle and the 3.5mm socket allows you to connect to an amplifier or other audio device and listen to audio from it. The 3.5mm socket should NOT be used for headphone connections.