This AutoMeter water temperature gauge is exactly what you need for keeping tabs on your marine engine's health! The 2 1/16 inch size fits perfectly in standard gauge panels, and the marine chrome finish looks professional while resisting corrosion. It measures from 100 to 250 degrees Fahrenheit, giving you a clear range to monitor your engine's operating temperature. The electric operation means reliable readings, and it's compatible with both 12 and 16 volt systems - pretty much covers every marine electrical setup out there. The front sealed bezel design is a nice touch for extra water resistance, which is crucial when you're out on the water. The protected paint on the dial pointer prevents sun damage, so your gauge stays readable season after season. Just remember you'll need the 990344 sending unit separately to make it work. The packaging is compact at about 11x12x13 cm, so storage is easy until installation. AutoMeter has been making quality gauges forever, and this one lives up to their reputation. Whether you're replacing a faulty gauge or adding monitoring to your boat, this gives you the peace of mind that comes from knowing exactly what your engine's doing temperature-wise. Definitely a solid investment for any serious boater who wants to avoid overheating issues before they become expensive problems.