Material Made in silicone, environmentally protective and ideal for resistance against drink or food spillage's at home or at work Moisture Prevention Waterproof-ideal for use in adverse, humid or even low-level water conditions. Compact 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 periods of time. No noise while typing Harmless to the human body with excellent softness Portable with the proper size to fold or roll Resistance to the water or dust Easy to work for its round shape design Excellent and various in colors Long durability ,one million life cycle of key Application Hospital Office Factory Laboratory Library Military Automotive industry Garage Medical and hospital Workshop Mining and Quarrying Classroom Restaurants and kitchens Kids room Laptop users The keyboard is soft to the touch with silent keys, this feature could be useful in such places as: Libraries Offices Cybercafes Hospital wards Boats Note taking situations Call centers Specification Compatibility: IBM AT, Windows98 2000 XP Communication: PS2, USB, COMBO(USB+PS2) Port Color: Black, Light green, Light Blue, Transparent, any color as require Layout: 109keys Electronic data: +5V DC ? 250mA Total travel: 2mm?