DESC: With Kensington Adjustable Desktop you gain valuable workspace, organize your desk and position your monitor to the desired height. Platform adjusts from 2.5" to 4.5" above the desk and allows for keyboard storage. Two adjustable shelves hold speakers, PDA cradle, just about anything on your desk. The desktop supports up to 35 lbs (eq. 21" flat panel monitor). The rubber feet protects surface.