Balt Alpha Laptop Cart - Height Adjustable Mobile Workstation (27588) The Alpha Cart is a versatile, mobile, and modular cart ideal for document cameras, projectors, laptops, and other audio/visual equipment. Frame includes 3" locking casters on a stable star base, and three independently height adjustable equipment shelves. All shelves include non-skid EVA pads. Center post acts as a hub, allowing for the three included shelves to be positioned exactly where you need them. Cable management clips keep cords under control. Laptop/keyboard shelf is angled 7, measures 15.75" x 11.75", and includes a mouse platform (6" x 6.63") that swivels beneath when not in use. Two wing shelves 15" x 11" and includes an adjustable equipment security strap; masures 15" x 13.63", includes an adjustable equipment security strap, and a retractable platform (13.5" x 8.63") for projection materials.