The perfect outdoor clock that illuminates at night. The movement is sealed with a gasket for protection from outdoor elements. Two-step metal case in oil rubbed bronze finish. Arabic numerals and instrument graphics are printed with a light reflective ink, then covered with a clear acrylic diffusing overlay. Illuminate at dusk and keep the dial visible until automatically shutting off at Dawn. Includes a thermometer with Fahrenheit and Celsius scales and a hygrometer. Time format: analog power sources: requires four d batteries sold separately movement type: quartz overall diameter: 18quot;.