The Slate Indoor / Outdoor Clock by Infinity Instruments is rated for indoor and outdoor use, and runs on AA batteries. A very elegant outdoor clock, this piece works great on a closed patio or open deck. This outdoor clock has a 24.5 inch diameter and includes a thermometer and hygrometer. The frame is a slate design with black numbers on a distressed background. This clock comes with a 1 year limited warranty. This item cannot be shipped to Canada.