Pointing Device ,trackball,industrial trackball, kiosk trackball,stainless steel trackball,backlight trackball Pointing Device ,trackball,industrial trackball, kiosk trackball,stainless steel trackball,backlight trackballPatent No.200730172724.5Key specifications/special ... : 0.2 kgSize: 47*48mm/or moreEnvironment adaptability: Keyboard is watertight when mounted correctly to ATM Protection level: ...