Self Reset Metal Switch 12V-24V LED Illuminated Ring Green Vandal-proof Self-resetting button with white LED backlight. Made of brushed stainless steel, resistant to corrosion. The diameter of the mounting thread is 16mm. Self Reset switch: ON OFF Monostable switch Voltage: 12V-24V 5 pins 2.8mm x 7mm Electric life: 50,000 Mechanical life: 500,000 Backlight color: Green (button border green highlighted) The switch is made of high-quality brushed stainless steel Rubber gasket included Working temperature: -20ºC to 55ºC Key diameter: 13 mm Dimensions: 18mm x 35mm Connection instructions: " NO " and " C " connected: the circuit is always open unless you press the button. " NC " and " C " connected: the circuit is always closed unless you press the button. 1. The button turns the device on and off, the circuit is normally open, pressing the button closes the circuit (the backlight only works when the button is pressed) 2. The button turns the device on and off, the circuit is normally open, pressing the button closes the circuit (the backlight remains on regardless of pressing the button) 3. The button turns the device on and off, the circuit is normally closed, pressing the button opens the circuit (the backlight works when the button is not pressed, the backlight turns off when the button is pressed) 4. The button turns the device on and off, the circuit is normally closed, pressing the button opens the circuit (the backlight works all the time regardless of pressing the button) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.