Momentary Push Button Switch: Push & Hold-ON, Release-OFF; Electrical life: 100, 000 times, Mechanical life: 500,000 cycles Mounting Hole: 16mm(5/8"); Structure: 1NO 1NC; LED Light: 5A 12V-24V Halo Ring White; LED life: 40, 000 Hours 4 wiring methods: LED light can be always on, or illuminates when the device is working; Each switch equipped with one pre-wired socket which make the wiring easier High Quality: stainless steel case and silver alloy contact make the switch more durable and with high conductivity; The switch can be used in complex enviroment with waterproof IP66 and anti-vandal IK09 Wide Application: Suitable for car, computer, instrument and meter industry, door bell, home appliance etc.