... places, for example,factory workstation,oil field,mine,water factory,and self-service kiosks deployed in cinema,theater,shopping mall,campus ... key(2.0mm) with etched or laser engraved graphics - Trackball: Stainless steel(Dia: 38mm) Electrical Data - Power supply voltage: DC 5 V ± 5 ... axis 150 m/s² - 11 ms, IEC 60512-4 Operation system - PS2: Win NT4, 98SE, 98ME, 2000, XP - USB: Win 98SE ...