Great item. Robust construction and locking for assembly and installation. Does exactly what it says. Only 1 thing I think is wrong. It looks like there should be a back plate covering the electronics. There's a tiny protrusion and accessible screw holes that look like there should be a plate there. So I put it on a black plastic sheet. Trace the outline, cut 1/16 inside the lines and BOOM! backplate. After making sure it would fit, I glued it with silicone and screwed it in place. Now I don't have to worry about moisture affecting the wiring. She shouldn't have sent back for something she might not have come with, but I trust my methods.