HOTSYSTEM 16mm 12V Red LED Light Ring Self-Return Switch Stainless Steel Reset Push Button Metal Switch for Car SUV Vans Truck Boat Refitting Interior Lighting Klaxon Horn Perfect switch for Car interior refitting light / klaxon horn electric appliances Constructed with Heavy duty Stainless steel body Works well with the Mac Mini and any device that requires a momentary 12V pulse to initiate on/off functions Remember never can take C positive, take the NC and NO negative, this switch is sure to burn Please read all description before ordering the product & this switch requires a 16mm mounting hole