Desk Riser and Dual-Monitor Mount lets you work from a standing or seated position. Benefits of alternating between sitting and standing positions while working include reduced back pain and a boost in overall health and energy. Sleek workstation measures 31.5" wide x 17.45" deep and fits over existing desks up to 3.5" thick. Riser adjusts to heights ranging from 4.3" wide to 19.17" deep, allowing people of most heights to work from an ergonomic position. Gas piston assist helps desk riser support up to 30 lb. Detachable keyboard tray measures 29" wide x 10" deep and is positioned 4" below the desktop. DM2 monitor mount (included) can support two monitors up to 27" and 17.6 lb. each. Versatile mount allows monitors to tilt approximately 45 degrees, swivel 180 degrees and rotate 360 degrees. Grommet hole and cable-management clips organize messy wires and tidy surround work space. Additional features include a 10.5" slot for a tablet or mobile phones.