... electric equipment; good quantity & service; RoHS material; switch boardMembrane switches is a type of keypad, which can ... parts began early 1980.1)Items——membrane switch, keypad, membrane keypad, keyboard switch, switch panel, membrane panel, membrane overlay, membrane ... morej) Surface hardness——3H or more k) Operating temperature—— -40°C ~ +80°Cl) Storage temperature—— -40°C ~ +85°Cm) Humidity——90 ...