I have had good luck with that. Before I buy anything at all, including electronics, I check the country of manufacture. I sometimes end up paying more for an item but to me it is worth the additional cost to get good quality in the things I buy.
The PWM that you linked to is made in China. I try to stay away from Chinese made electronics. Their reputation in electronics is worse than Japanese electronics were in the early 1960's.
Unfortunately, the relay, wire, switches and fan are also from China.
I am all in favor of buying local when I can but cutting out "Chinese" electronics is all but impossible today. Even items "Made in the USA" are using components and chips that come from China.
In this case, it is a fan setup. Some day, if the fan ever stops blowing, I'll look for a more reliable solution.
Off topic (sorry):
I caught them near the very end, Clockwork Angels tour. They were excellent, and I've seen my fair share of concerts. Geddy could not hit the high notes anymore, that was painful, but Neil still had every bit of what he always had. That one hit me hard when he went.
Anyways.....back to ROPS lights and fans and things..