What is this and what does it do?

IMHO, the relay you have is very simple to mount and wire. It takes care of both high and low beams too.

The Tyco relays are nice, but I'm sure the next question is "how do I hook them up", followed by "should I buy this expensive wiring kit?". A goggle search will find a bunch of ways to wire them and I think the wiring kits, as nice as they may be, are expensive provided you can do the work yourself. But... you really can't beat the simplicity of the relay you have. Again, that's my opinion.

FWIW, I buy these: https://www.amazon.com/gp/product/B000P61E36/?tag=joeychgo-20

and then wire them using a socket like these: https://www.amazon.com/dp/B00KXFIGTY/?tag=joeychgo-20 although I can usually find the sockets cheaper on eBay.

I always post this for someone that is working with a wiring harness. A piece of plywood and some finishing nails makes things easy... and it's the way they build wiring harnesses in many industries. Lay it all out and replace one wire at a time and then wrap it with non-adhesive tape.

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