Review on Accurate And Durable - Digital Pressure Gauge With NPT1/4 Interface And Silica Gel Case - 0.4%FS Accuracy For Hydraulic Gas And Water Pressure - 1 Year Warranty by Robert Helstrom

This replaced an oil-filled gauge that had started reading incorrectly and I'm glad I bought it. It's accurate (checked with another gauge I had) and easy to read. The light is nice in the dark area where it is installed. Takes two AAA batteries that are easy to change, but be sure you can reach the back where they are inserted. Have had it for over 5 months and just changed the batteries.