I use this to reverse polarity for a linear actuator to close a chicken coop door. Has been working flawlessly for about 5 months now. There are no instructions or anything in the kit but I found and used the schematic elsewhere. Most likely because it can be used for a variety of purposes I can imagine. It still ran all through the very hot summer (around 100 degrees, packed but protected so maybe it got a bit hotter) and winter (coldest was 13 degrees) so I'm very happy with it. I think only time will tell how long it will last but for now I think it's a good product.
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