Review on 🚗 WATERWICH Tachometer 0-10000 RPM Gauge Meter: The Universal Automotive Essential for 4-8 Cylinder Cars, SUVs, and Vehicles by Byron Forman

The instructions on this are horribly poor even by the low standards you'd expect from Chinese imports. Also, it's a five-wire cable instead of the standard four-wire, so decent instructions would help figuring out where everything is connected. Everything was finally connected correctly, the bottle selector didn't work. Luckily it stayed where I needed it. It's also very difficult to read with a dark blue tint on it. If it's supposed to be illuminated for daytime driving, it doesn't work. Otherwise it worked for a good 20 minutes. Then the touch screen showed only zero. Now I have to pull the dash back out to install anything that works.