The DT-2000-TB keyboard is constructed using a highly-rugged stainless steel case and industrial silicone rubber pad, ensuring NEMA 4X protection. The DT-2000-TB’s trackball pointing device is a completely sealed 38-mm laser unit, featuring a removable ball for convenient cleaning, as well as an adjustable tension ring. The trackball is operated using sealed stainless steel switches with left and right click functions and a third programmable button.