Programmable electric height adjustment recalls your favorite settings with a single push of a button Included clamp-on adjustable height desk shelf raises monitors to comfortable, ergonomic viewing height and creates more usable workspace 3-stage telescoping legs provide an extended height adjustment range to accommodate shorter and taller users; includes a set of furniture feet as well as a set of 2" locking casters Desk dimensions are 47.25 W x 29.5" D x 25.25" to 51.5" (with included furniture feet installed, casters add 2" to the overall height); shelf dimensions are 47.25" W x 11.25" D x 5" to 7" H (adjustable in 1" increments); max weight capacity is 155 lbs; BIFMA certified for safety and durability; easy assembly Stand Up Desk Store is a US-based company and stands behind all items we sell; this item comes with a limited lifetime warranty against defects Stand Up Desk Store's Electric Adjustable Standing Desk with Programmable Memory delivers all the quality and features you need to enjoy a healthier, more productive workday. This two tier model Includes our clamp-on adjustable height desk shelf, which raises monitors to comfortable, ergonomic viewing height and creates more usable workspace. The programmable electric keypad recalls your favorite sitting and standing settings with a single push of a button, while 3-stage telescoping legs offer an extended adjustment range over competitors' models, which better accommodates taller and shorter users. Comes with both a set of furniture feet, as well as lockable casters to provide mobility and increase the overall height by 2". Desk dimensions are 47.25 W x 29.5" D x 25.25" to 51.5" (with included furniture feet installed, casters add 2" to the overall height). Shelf dimensions are 47.25" W x 11.25" D x 5" to 7" H (adjustable in 1" increments). Weight capacity is 155 lbs. BIFMA certified for safety and durability. Easy assembly. 5-year limited warranty against defects. Stand Up Desk Store is based in the suburbs of Chicago.