... materials, non-toxic, tasteless and harmless. 2, all-sealed design, waterproof, dustproof, anti-oil, anti-acid, can be used ... hit without sound, comfortable soft touch feeling. 5, special design and production process, so that the keyboard is lean, and ... Note: may not be touch with high-temperature materials such as cigarettes and so on. newest design 106keys folding silicone waterproof keyboard