Regarding the lifetime of this product, silicone rubber switches can be pressed up to one million times. Customers can choose metal dome or conductive carbon pill for the switch, and the surface treatment of the silicone rubber switch can be PU coating or Epoxy glue. We can do laser etching on all the symbols, and the LED light can go through the symbol. We can also print any color on the surface of the silicone rubber keypad with silkscreen printing