Control box easily moves Safco Medina Height-Adjustable Desks from 29-1/2" to 47-1/2" at a speed of 3/4" per second for quick adjustment. The control switch has simple up/down buttons to adjust the height. Medina captures the spirit of Italian design that fills any space with style and height-adjustable capabilities to ensure maximum work-space customization. Height-adjustable desks serve a wide variety of users and create active engagement while at work. Medina offers a choice of components to allow an ideal range of workplace configurations, such as returns, bridges, pedestals and hutches. Tops and bases are sold separately.