This Multifunction Mobile Stand-Up Computer Desk Work Station combines simple design, solid construction, and multiple surfaces to deliver a cost-effective solution for office and classroom presentation needs. A bottom shelf with 19.75" of clearance offers ample space for PC towers and the height-adjustable second shelf serves as a keyboard tray whether you're sitting or standing. When it's time to store or use the cart elsewhere, 4 rolling casters with 2 locking brakes make maneuvering quick and easy. Assembly Required (level - easy) Constructed with black powder coat painted steel frame with laminate work surfaces Rolling cart with four silent-roll 3" furniture casters, two with locking brakes, for mobility and stability. Optional locking cabinet for housing IT equipment Only the extended shelf can be removed Optional 3-outlet UL-Listed electric assembly with 15' cord Material - Steel Dimensions - 40.25'' H X 18'' W X 30'' D Weight - 50 lbs.