... -proof, meet IP65 requirement 7) PS/2 or USB interface, easy to plug into computer directly 8) ... V ± 5% - Current rating: 20 mA - Interface: USB or PS2 - EMC compliant. Emission: EN 50081-1 Immunity: EN ... system - PS2: Win NT4, 98SE, 98ME, 2000, XP - USB: Win 98SE, 98ME, 2000, XP, Mac OS9 / OSX Reliability ... Photos Certifications Industrial metal keyboard with touch pad,function keys and number keypad