Review on 🚗 ESUPPORT 12V Car Auto Blue LED Light Momentary Speaker Horn Push Button Metal Toggle Switch 19mm: Enhance Vehicle Safety and Style with a Multi-functional Switch by Shane Sanchez

Knob 19 mm, horn symbol lights up red. Not sure if it's incandescent or LED, but the light source is usable nonetheless. The case looks like metal, the buttons are made of plastic, everything shines silver and looks decent. The button action has a tactile sense of being activated. I bought another one that didn't have tactile feedback and didn't like it. There is no schematic and I asked for it, but then I just looked at the switch itself and everything became clear. A + sign is clearly formed on one side, and - on the opposite side. Bottom center are three shaped a different color with NO, NC and C shaped. You can google them but they are basically normally open, normally closed and normal. In general, for me I have joined the input +. Then I used a closer. So there is no signal on the NO wire until you press the button then you will get +12v to signal the horn or relay if your horn is very loud. The details indicate a 5A load that can be carried, but I don't trust that, plus the wire I used was quite small. Mine powers the relay. One star is not enough for the fact that there is no graphic, not even a link in the product description.