1. Universal fit all 12V Car SUV truck conversion Van RV Boat Yatch.For example， it can be applied as the switches for the additional electronical equipment inside&outside the car.(such as flashing lights， chassis lights， and dome lights)2. Easy setup. All you need is a 0.74"/19mm hole and the switch will sit in nicely.3. LED on all the time or only when switch is on(depending how you wire it)Features:Head Diameter:22mmButton Diameter: 13mmHole size required: 0.74''/19mmDepth inc contacts: 40mmContact Configuration: 1NO 1NCOperation Type:LatchingLatching type: push it��on(off)， push it again -- off (on)Package Include:1 X Purple LED Push Switch