round start button momentary push button switch start button car start button waterproof button switch momentary metal metal black shell FG05 Curved screw connection curved screw terminals, clamps for very easy installation. Car ignition key high-quality metal materials and waterproof IP65 protection can be used in wet or dusty environments. Start switch panel - 16 mm, switching capacity: 3 A/250 VAC, switch: 1 no Engine start button: the push button is a momentary switch that only causes a temporary change of the state of an electrical circuit when the switch is physically activated. An automatic mechanism (such as a spring) returns the switch to its standard position immediately afterwards and restores the original state of the circuit. Start button often used as a vehicle horn, ignition switch, doorbell, button for household and car devices, project for technical equipment.