1,Ruggized industrial keyboard with trackball 2,Water/dust proof 3,103 keys,including 12 Function keys and number keypad Key ... Features: 1) Waterproof industrial keyboard with 103 keys,including 12 function keys and number keys2) Panel mount ... public places, for example,factory workstation,oil field,mine,water factory,and self-service kiosks deployed in cinema,theater,shopping ...