ESUPPORT Car 2" 52mm Digital Tacho Gauge Red RPM Tachometer 0-9999 Automotive

Works as should and looks good.

pos reads 9999 right from the start

So nothing wrong with the shipment however I read others reviews about how the tachometer did not work correctly and was junk. I decided to take the risk because they may have had faulty equipment or bad installation. I had mine professionally installed and loved how it was digital. However it is not accurate at all. I would be driving down the road and my rpms would say 1100...1700...4500..3200 erratically hardly ever stabilized at a given rpm. A 100rpm fluctuation is acceptable..not 1000 to 2000 rpm change. So I was recommended that a resistor needed to be installed on the signal wire to filter out unwanted volt spikes. Had it done and at FIRST it seemed to work but the tach still was not accurate and would erractially try to say my engine was at high rpms when at idle or low speeds. So dont be like me and take the risk just dont buy it buy a more expensive quality option. Thankfully amazon is giving me my money back so no waste on the part just in labor I'm out on.

Seems like a reasonably high quality for the price, unfortunately it does not work with my 2-cylinder 4-stroke outboard boat motor. I tried all cylinder settings and while it was reading something, it was a factor or 4 or more high from what it should be. I would definitely buy for a car, but look elsewhere for outboards.

It worked great on my 1960 chevy pickup truck that I have installed a pertronics pointless ignition in.