The Rocelco Electric Desk Riser bundle provides effortless functionality in a standing desk converter, with smooth quiet up/down motion at the touch of a button. Features a large 46" x 23.6" work surface, plus a full size 35" x 10" fixed keyboard tray that holds a keyboard or laptop. Electric lift system raises up to 35 lbs, with Enhanced Vertical Range from 4.7" to 21.7" allowing comfortable ergonomics for users of all heights. Useful extras include 4 AC outlets + 2 USB 2.0 ports on the desktop, a 10.5" wide slot on the main work surface to hold a tablet or phone, and a rear grommet hole for an optional monitor arm. Included Rocelco - Double monitor Arm with (Gas Piston Counterbalance Motion Assist) allows effortless independent screen adjustment for comfortable viewing. Fits two 13"-27" screens up to 14.3 lbs each. Includes USB and multimedia ports to conveniently connect and charge your devices. Quick installation and adjustment no tools required. Cable channels provide a hassle-free way to run your cables and maintain a tidy uncluttered workspace. Includes two mounting systems to attach to your desk clamp and grommet.