Bulova Tide Light Illuminated Wall Tide Clock

C 4891 Tide Light A fully back lit dial and bold scale make this tide instrument easy to read day or NIGHT, A light sensor automatically the illuminates the dial for easy reading in low light and shuts off when enough ambient light is in the room. Molded two step case finished in a Navy gloss blue has a protective glass lens and contrasting matte silver inside bezel ring. The most accurate readings are along the Eastern seaboard of the United States and Europe showing the actual time before each high and low tide. Great for sailors and Landlubbers alike. Requires 1 AA battery for the instrument and 3 AA batteries to power the light ( not included) dimensions : 10" diameter x 1.75" D