iKey DT-TB-PS2 Optical Trackball - PS/2

The DTTB offers solid state, laser trackball technology, in a completely sealed and waterproof enclosure. The DTTB's 38mm trackball sits inside polycarbonate housing within a stainless steel case. The trackball is easily removable for convenient cleaning, while an adjustable tension ring ensures the proper amount of trackball smoothness for any user. In addition, the DTTB features sealed, stainless steel switches, including a programmable button.