Note: this is Momentary switch, push it-- on, Release -- off1. This has a wide range of functions. For example, it can be applied as the switches for the additional equipment inside & outside the vehicle.2. For load under 5 Amp, you do not need a relay with this switch. For load above 5 Amps, we advise you to use of Automotive Relay (sold in our store).3. Easy setup. All you need is a 0.74" hole and the switch will sit in nicely.4. LED momentary off / on / off button. Features:Led Power Switch momentary typeLED Light: Blue/Red/GreenLED voltage: 12V onlyContact Configuration: 1NO 1NCOperation Type: MomentaryHead Diameter:22mm/0.86"Button Diameter: 15mm/0.6"Hole size required: 0.74&39;&39;/19mmDepth inc contacts: 40mm/1.57"Quantity: 1 Pc Note:Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bidDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank youPackage Contents:1 x Momentary Switch", ",