... 106 keys1, environmental protection, use of imported high-end medical-grade silicone materials, non-toxic, tasteless and harmless. 2 ... the keyboard is lean, and use of special high-strength silicone adhesive glue, without any metal nails, performance stable ... Special Note: may not be touch with high-temperature materials such as cigarettes and so on. 106keys high quality silicone waterproof keyboards