Electric sit-to-stand desk riser's spacious, ergonomic workstation encourages productivity by accommodating two monitors up to 31" each. Benefits of alternating between sitting and standing while working include reduced back pain and strain and a boost in overall health and energy. Work space also features four 120-volt AC outlets, two conveniently placed USB 2.0 ports and a 10.5" slot to hold a tablet or mobile phone. Fixed keyboard tray measures 31.8" wide x 11.8" deep and can support anything from a keyboard to a laptop. Electric standing desk converter supports up to 33 lb. Single-button converter silently adjusts workspace height from 4.7" to 19.7" , allowing people of all heights to work from an ergonomic position. Grommet hole on the rear of the work space provides hassle-free cable/wire management. Minimal assembly is required.