... ~+85 degreeHumidity40 degree 90%~95% 240hoursMembrane switch,membrane keypad,membrane keyboard Advantages:Beautiful appearance, rich and bright in color ... protection of durable color, characters, logos and other panel contents without injury.Small size, light weight, thin ... .Electronic characteristicscircuit rating:35v(DC) ,100mA ,1WMechanical properties actuation force:flat type57-284g(2-10 Oz) tactile ...