... ,dustproof,long life 2)similar keyboard can be used 3)flexible,soft,smooth,good touching rubber silicone keypad/wireless silicone keypad ... made in high grade and high transparent,high tension silicone rubber,enviromental safe material,non-toxic. the hardness of the ... 3.soft, flexible and water-resistance of the silicone keyboard 4.all manufacturing processes confirm to the ISO9001-2000 standards5 ...