Review on ARCELI KY 019 Channel Module Arduino by Tim Morrison

They will definitely work but only for a few uses. I burned 2 of these in 10 days. Like some other reviewers, I use them to switch my 3D printer to 24V. I'm running some tests to see if I'm trying to break too much load. They seem to work when the printer is fully cool and most of the fans are already off, but I know that at least the second one didn't turn on when the printer was cool (I've never switched while printing or under heavy load). They can perform better in very low power applications so I don't think they are a 1 star product, they just should be clearer about what they can handle. can be replaced if one breaks, so for the price they seem like a decent deal. Now I just need to find the ones that can switch at higher currents!