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) SPECIFICATION ?Compatibility: IBM AT, Windows98/2000/XP ?Communication: PS2, USB, COMBO(USB+PS2) Port ?Color: Transparent, any color as require Packing Style: Color box(Retail packing) Packing Info: Color box size: 50 x 15 x 4cm Carton size: 53.5 x 33 x 43cm N.W.: 8.0Kg G.W.: 9.6Kg Space G.W.(W*H*Lcm/6000): 12.65kg QTY: 20 pcs Certificate: CE & RoHS