Easy to set up. All you need is a 3/4-inch (19mm) hole and the switch will sit nicely; No more square cutouts. Our switch is equipped with a kyhole hole to prevent unwanted rotation of the SPST 2 pole design (On/Off) 3rd poles with LED to be connected to the ground. Features: can be used as switches for additional electronic equipment inside and outside the car. (such as flashing lights, chassis lights and e-lights)Condition: Color: Black & BlueMaterial: PlasticLight Color: Blue Bright LED Light Size: 2.3*2.5cmQuantity: 1 pcGrade: DC 12V 20ATtype: 3 PinsSPST: ON-OFFUnote:1. Manual is not included, professional installation is recommended.2. Please check the size chart carefully before payment. Package Included: 5pcs Blue Bright Light LED Round Switch (Waterproof)Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.