I would give them 5 stars (they really deserve 5) but the guide was written by a person who doesn't speak English well. "Connect one of the switching contacts to the "+" power supply"? Which of? If you don't get the right one you will blow the fuse. Was able to figure it out and as I said they are great switches. Also note the 5A limit. So if you want to draw more, you need a relay. I bought these for my boat lights and as they are LED I have no idea they will ever draw more than 5 amps. Overall a great product. I will buy more if needed.
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