Review on Upgrade Your RV Lighting with KITASST Smart DC 12V Dimmer Switch - Perfect for LED, Halogen, and Incandescent Lights by Malik Munns

I'm ambivalent about this device. I bought some dimmers and a grid controller to use as a dimmer for my caravan. I was planning to run 8 lamps in 2 banks of 4. First of all, good. The devices work as advertised - connection is easy, setup via the mobile app is easy and pairing the wall controller with devices is effortless. It takes a few seconds to reestablish all wireless connections after a full system shutdown, but everything just works. The wireless wall controller is especially handy - you don't need to run an app on your phone. The problem is a weak side dimmer. It must be placed in the ground wire of the controlled device. My RV (and many others) provide access to the hot wire on the control panel, but usually not the ground wire. I wanted to control two blocks of four lights with two controllers, but I can't access the bases for all the lights independently, and I can't run wires through the ceiling to all the lights involved.