If you need a mobile or stationary standing desk, look no further than the Rocelco MSD-40 Height Adjustable Mobile Sit to Standing Desk. Now you can sit part of the day or stand to take advantage of all the health benefits that come with standing and moving around. Great for a classroom or conference room because it requires no electricity. The standing desktop measures 40"W x 21"D and can easily hold two 27" monitors and a laptop. With its easy height adjustments, you can raise the desktop from 31" up to 49" above the floor for a complete sit to stand workstation. It also includes a retractable ergonomic keyboard tray so you can continue to work comfortably. The standing desk can be mobile if using the locking casters, so you can wheel it anywhere you need it. Internal gas piston assist allows you to easily raise and lower up to 40lbs. Grommet hole allows you to route cables or add an optional single or dual monitor arm such as the Rocelco DM1 or DM2 which are recommended when operating with locking castors. It can be used as a standalone workstation, as an extension to your current desk, as a podium, or as a sit-to-stand school desk.