... % function test 3.Warter-resistant Water-proof membrane keypad with metal domes: Membrane switch, Graphic overlay, as a new ... in the market for the last decade. It integrates switch key, functional word, marker, trademark, transparent window and display ... , touch screen and assembly module, etc. Water-proof membrane keypad with metal domes specifications: Electronic Characteristic <35V ( DC ) <100mA 1W ...