... color, characters, logos and other panel contents without injury. 3. Small size, light weight, thin thickness, good tactility,abrasion resistant,installation ... , high lifespan, membrane switchs design and manufacture are using the keyboard as a whole way, whether on the material or mold ... , Storage temperature: -40oC - +85oC Humidity: 40oC , 90% -95%, 240 hours keyboard membrane switch