... life(5 years) 3.Simple installation 4.Wide application Magnetic Switch for Refrigerator DoorsProximity Switch MS-05Work Theory: When the magnet is reach ... Application:Security alarm, air bag , seat belt, switch on for fridge, mobile phone, laptop, and so on.If there is no product ... suitable for your desire, you can also send some data and pattern of your product that you desired , our company will ...