Review on Southwire M500CX4 Coax Continuity Tester/Mapper: Durable Design, Auto Power-Off, LED Display & 4 Color-Coded Remotes by Daniel Espinoza

It worked, I assumed it would also produce an audio sound, although it doesn't, just a visual one which is still fine. You may get bad and wrong readings, but this is NOT related to the product. If you're passing splitters or there's equipment on the line, you might get inaccurate readings, and that makes sense. This is for the "continuity" that this material naturally provides.