... -resistant, dust-proof, gas-proof and scratch-resistant 6. Long life cycle.Electronic Characteristic<35V ( DC ) <100mA 1WLife Expectancyflat type ≥ 500 ... , the products can fully reflect the individual style of the product itself and designer. 2. Panel can wash, good protection ... the material or mold charges, the costs are lowest, the life expectancy of different types of membrane switch is more than ...