... durable color, characters, logos and other panel contents without injury. 3. Small size, light weight, thin thickness, good tactility,abrasion ... high lifespan, membrane switchs design and manufacture are using the keyboard as a whole way, whether on the material or mold ... 0.1-0.5mm, tactile type 0.6-1.5mm 3. Environmental parameters Operating Temperature: -40 oC- +80oC , Storage temperature: ...