... .High quality 2.No Volume limit 3.ROHS Compliant Membrane switch with poly dome/metal dome, SMT LED, PC and PVC film ... keypads Characteristics: Assembled with SMD LED, resistors, connectors and other components Components are guaranteed ... Celsius Life expectancy: 500,000 to 30,000,000 cycles Switch stroke: 0.1 to 0.6mm Contact bounce: 5 to ...