The new ALTA Sit to Stand Adjustable Height Desk has a state of the art design that stands out far beyond any other height adjustable work center available! The ALTA Sit Stand Desk features a unique open frame design that extends to accommodate table-tops from 48″ to 80″ wide. Additionally, the base is made up of durable steel channels that connect both columns for a dependable lifting force of up to 350 lbs! The need for a cross channel has been eliminated to give you all the necessary leg and storage space that you require. The height adjustment for this electric desk ranges from 24.5″ to 50.5″ at a speed of 1.5″ per second. Unlike other heavy duty desks, the Deluxe Sit Stand Desk features an internal motor on each lifting column which isolates the noise with smooth synchronized lifting.