The AcuRite 24-inch LED wall clock is an elegant way to stay on top of the time — whether it be day or night — while you relax on your patio or deck, play with the kids in the backyard, or even as you cook — as this could double as an outdoor kitchen clock! The battery-powered clock uses an integrated light sensor to automatically illuminate for four hours when dark. Or, you can select the always-on-when-dark or the always-off mode. With an included temperature gauge and hygrometer on the clock face, you’ll always know just how warm or cold it is outside and the current outdoor humidity. Durable, all-weather construction makes this large wall clock a functional porch clock, garden clock, or farmhouse wall clock, especially with its integrated keyhole hanger on the back for easy mounting. The stylish design and roman numerals also make it perfectly suitable as a bedroom clock, bathroom clock, or clock for other indoor decors, such as a dining room, wine cellar, or rec room. The clock mechanism features a reliable quartz crystal movement and requires one (1) AA battery (lithium recommended; not included). The backlight requires four (4) D batteries (not included). The thermometer measures temperatures from 0 to 100 degrees Fahrenheit and the humidity sensor readings range from 1% to 99% relative humidity. If necessary, these readings can be manually calibrated by rotating their movements on the back of the clock. This LED clock comes with a one-year limited warranty.