MATCC 2 Inch 52mm 100-250 Degree F Car Auto Water Temperature Gauge Backlight 12V 2 inch water temperature gauge with backlight.Has a built in light. Easy to install.Back-Lit illumination for night use. Scale from 100 to 250 Degree F.Suitable for 12 volt systems.Prevents overheating or cold seizure. Mounting directly in 2 inch hole.Air-core meter moverment.Rear twist-on ring mount design makes mounting simple. Come with black metal panel ,with removable black mounting panel.and 'U" bracket for add-on or replacement purpose. For all water cooled engines with sender thread connection.It can alert you that higher or lower than normal water temperature reading,to protect your driving safe.