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 levels. Durable, all-weather construction makes this large wall clock a functional addition to any porch, garden, or farmhouse that is easy to mount with its integrated keyhole hanger. The stylish design also makes it a perfectly suitable bedroom clock or clock for other indoor decors as well, 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 feature requires four (4) D batteries (not included). Even though this is not a small clock, it's far from gaudy. This big clock features easy-to-read, large, and elegant Arabic numbers and accurate temperature and humidity measurements that make for the perfect backyard or in-home addition. This clock comes with a one-year limited warranty.