This is a vandal-proof 38mm dynamic trackball with IP65 rating. Integrated with stainless steel mouse buttons to help with quick and precise positioning. It can be desk mounted. Its main feature is that it uses existing mouse driver and mouse software interfaces to work on computers and workstations. The device is extremely strong, rugged, smooth and has all metal mechanicals. They come in different diameter range of 40mm, 38mm, 25mm, 22mm, 19mm and 16mm or Hard Phenolic Resin Ball to deliver precise cursor positioning and durability. Accurate movement of cursor and its acceleration (retains one-pixel positioning) is ensured with rate sensitive dynamic resolution. Dirt and water protection is ensured with teflon ball shields.