Check the listing for details. Push Button Switch 12/16/19/22mm Metal LED Light Momentary Latching Waterproof. Condition: New. Listed at 1.59 USD. Push Button Switch 12/16/19/22mm Metal LED Light Momentary Latching Waterproof illuminatedNote: the connector needs to be purchased separately1.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. Please note that 1. All push button switches can be customized if you have any need or demand , Please feel free contact with us . 2. There are some errors 0~2mm in specification of push button switches . 3. About the shipment , Container ship or Air transport is also available . You can mail to us and get FOB or CIF price . Thank you for your understand and help