Self Locking Metal Switch 12V-24V LED Illuminated Ring White Vandal Resistant Bistable button with white backlight LED. Made of brushed stainless steel, corrosion resistant. Mounting thread diameter fi16mm. Self Locking Switch: ON OFF Bistable switch Voltage: 12V-24V 5 pins 2,8mm x 7mm Electrical life: 50 000 Mechanical life: 500 000 Backlight color: White (button circumference highlighted in white) Switch made of high quality brushed stainless steel Rubber gasket included Operating temperature: -20ºC do 55ºC Key diameter: 13 mm Dimensions: 18mm x 35mm Connection instructions: Connected "NO" and "C": the circuit is always open unless you press the button. Connected "NC" and "C": 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 works all the time 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 will turn off when pressing the button) 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. Sold by-dadangjia