Review on Partsam Universal Repeaters Clearance Identification by Kevin Schnitzer

It's small. I mean they give you a measurement but you should be aware that any size you come up with will be smaller. I sealed mine where the base and lens meet thinking it would leak. Black wire is plus, white is minus on the ones I have. Just two LEDs means you won't have problems with glare in mirrors. The BIGGEST problem I had is how the wires exit from the back. Right in the middle, that's fine, but in two different places. Both wires don't come out of the same hole, they come out of two different holes. If you plan on drilling just two mounting holes and one in the middle to prep the wires, you'll need a hole almost 1/2 diameter for the wires to pass through. That's stupid. Massive hole for two small wires as they run 3/8" apart through the case.