AZUNO Compression Tester Automotive, Digital Compression Gauge 200 PSI for Petrol Engine Cylinder Compression Tester Kit with Adapter & Hose

This is a must have! Works perfect! I use it couple times a week for the past year. Have not changed the batteries, so great battery life. The pressure reading is pretty spot on so you can count on it being very accurate! So nice to read the psi in the dark!

Worked as advertised. Nice that it comes with batteries. I would recommend when using it to put some locktite on the threads where the hose goes into the adapter and anti seize on the threads of the adapter. If you don’t it is easy for the adapter to come off in the spark plug hole when unscrewing the hose and be difficult to remove.

Great price and great quality

It kept reading 80 psi no matter what I tried. Eventually figured out I had to tighten the internal valve on the end of the hose. Used a schrader valve stem tool. Now it reads accurate and works well.Good tool just a few QA problems from the factory.

I have used it on a few motors. Works great. Great value. Very durable.

Great product works well. Tops out at 200 so if you have a high compression engine like I do it w on’t give you the full compression. Otherwise easy to use with all the necessary adapters.

Worked for two cylinders before failing. Very nice design and easy to use but wouldn't hold pressure after two cylinders. Made me panic for a sec as I thought my low mileage engine was toast until I realized that the tool itself was bad and wouldn't build or hold pressure. Recommend avoiding. Been using these for many years and ended up ordering a US-made unit to replace this.

It’s a pressure gauge, it works. Batteries included.