This Mounting system comes with a mounting platform, a heavy duty arm, and a clamp. The mounting platform, which fits the iPad Pro 12.9" display, is designed for easy access to all of the iPad Pro’s electronic ports. It also has two flexible cords to securely hold the iPad Pro. The dual mounting arm expands to 24" for maximum flexibility and reach. The clamp allows you to easily mount the system to a wheelchair or tabletop. Platform size: (10 3/4"L) x (9 1/2" W) x (1 1/2" H), weight 2 lbs. Arm size: expands from (14 1/2" L) to (24" L). Mounting system weight 4 1/2 lbs.