Compatibility: IBM, Microsoft Windows 98, 2000 and XP Communication: PS/2, USB, combo (USB + PS/2) ports Layout: 18 keys Electronic data: 5V DC, 250mA Total travel: 2mm ±4% Features: Made of silicone, environmentally protective and ideal for resistance against drink or food spillage at home or at work Available in various colors Available in various layouts, letters and languages Moisture prevention: waterproof, ideal for use in adverse, humid or even low-level water conditions Compact size: the ability to roll up the keyboard makes it one of the most space-saving computer peripherals on the market today Keyboard: the colorfast printed letters won't come off even after long period of time, no noise while typing With excellent softness, harmless to human body Portable with the proper size to fold or roll Resistant to the water or dust Round shape design, easy to work on High durability: one million life cycles of keys Application: hospitals, offices, factories, labs, libraries, military usage, automotive industries, garages, medical and hospital workshops, mines, classrooms, restaurants, kitchens, kid's rooms, laptops, classrooms, mining and quarrying With CE, FCC and RoHS certification Item size: 140 x 170 x 8mm Carton size: 56 x 34 x 31cm Quantity: 100 pieces/carton Gross weight: 18.5kg