Yamaha depth finder will give precise depth readings from 2-1/2'~200'. It also has a 3-stage warning system for minimum and maximum depths. Waterproof gauge has a backlit display and keys with easy-touch programming. Black and white gauge face/bezels both included, customizing the look of your boat. Mounts in a standard 2-1/8" gauge hole, and the transducer mounts externally.