The RAM-B-189-TAB3U consists of a double 3.25" twist lock suction cup base, double socket arm, diamond base adapter and Tab-Tite universal clamping cradle. The suction cup base is designed to have a strong hold on glass and non-porous plastic surfaces. The mount is designed with a RAM 1" diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; this allowing for almost infinite adjustment and perfect viewing angles. The spring loaded Tab-Tite cradle makes it easy to load and unload your tablet, along with keeping it secure while on the go. Interchangeable cup ends are designed to optimize the functionality of your tablet, allowing access to audio jacks, sub, power, and other ports, your tablet can be used just as it was intended. The included back plate is interchangeable with various size support cups, making it compatible with numerous tablet models. New detachable support cups are the only components needed for purchase, attach to the back plate for support of your new tablet.