Certification : CCC,ce,CQCCurrent : 3AFeatures : self-recovery and self-lock typeMaterial : AlloyItem Type : SwitchesWarranty : 1 yearsIs Smart Device : NOModel Number : 12/16/19/22mm metal push buttonSwitch Type : Push Button SwitchMaterial : Brass nickel plating or Brass chromeCustomizable Material : Stainless steelLED Colors : Red Yellow Blue White GreenCustomizable LED Colors : Purple OrangeLED Voltage : Please choose the right Voltage in optionUsing : Car PC machine Device buttonsLevel : IP65Rating switch : 3A / 250VACCustomization : Yes , please leave a message to usSwitch type : NO (Normally Open) ; NC ((Normally Closed )Opening diameter : 12mm/16mm/19mm/22mmNote: the connector needs to be purchased separatelyDifference between auto-recovery button and auto-lock button:1. Self-recovery button: press this button to turn on the power (light on);Release your hand, the power will appear and turn off automatically (the light goes out)2. Self-locking button: press the power button, release your hand, and keep the button stationary (lit);Press the button again to display and turn off the power (the light goes out).Product parametersHead type: round headHousing material: metalOperation type: Momentary self-reset/fixed self-lockingEmitting color: red / yellow / blue / green / whiteOpening size: 12mm/16mm/19mm/22mmVery important: Because of the virus,the Economic shipping is slow,If you need buttons hurry,please choose Alistandard shipping1.What does the signal "NC" and "NO" means?"A" "+": positive pole of the led"LED" " - ": negative pole of the led" NC ": Normal Close" NO ": Normal Open" C " : Common2.How to connect?1.Connect " NO " and " C " : The circuit is alway open unless press the button.2.Connect " NC " and " C " : The circuit is alway close unless press the button.Various logo patterns can be customized, please contact online customer service12mm wiring diagramPress the switch, the load is energized, and the LED lights at the same time.Press the switch again, the button is reset, the load is powered off, and the LED goes out.Turn on the power, the LED lights, press the switch, and the load is energized.Press the switch again, the button is reset, and the load is powered off.Turn off the power and the LED goes out.Press the switch, the load is energized, and the LED turns offPress the switch again, the button is reset, the load is powered off, and the LED lights at the same time.Press the switch, the load is powered off, and the LED turns off at the same time.Press the switch again, the button is reset, the load is energized, and the LED lights at the same time.Turn on the power and the LED lights up. Press the switch, the load is powered off.Press the switch again, the button is reset, and the load is energized. Turn off the power and the LED goes out.