Detailed Product Description Specifications: 1) Compatibility: IBM AT, Windows 98/2000/XP 2) Communication: PS/2, USB, Combo (USB + PS/2) ports 3) Layout: 109 keys 4) Electronic data: +5V DC, 250mA 5) Total travel: 2mm?% Features: 1) Made of silicone, environmentally protective and ideal for resistance against drink or food spillage's at home or at work 2) Available in any color 3) Available in any layout / letter / language 4) Moisture prevention: waterproof, ideal for use in adverse, humid or even low-level water conditions 5) Compact size: the ability to roll up the keyboard makes it one of the most space-saving computer peripherals on the market today 6) Keyboard: the colorfast printed letters won't come off even after long periods of time, no noise while typing 7) With excellent softness, harmless to human body 8) Portable with the proper size to fold or roll 9) Resistant to the water or dust 10) Round shape design, easy to work on 11) High durability: one million life cycles of keys 12) Application: hospitals, offices, factories, labs, libraries, military usage, automotive industry, garages, medical and hospital workshops, mines, classrooms, restaurants, kitchens, kids' rooms, laptops, classrooms, mining and quarrying