... Waterproof industrial keyboard with 103 keys,including 12 function keys and number keys2) Panel mount(mounting from behind) to the ... IP65 rating when properly mounted6) PS/2 or USB interface, easy and convenient to use7) Optical trackball or mechanical trackball for ... for example,factory workstation,oil field,mine,water factory,and self-service kiosks deployed in cinema,theater,shopping mall,campus ...