The La Crosse Clock courtyard clock operates indoors or outdoors with its weather seal, it is sure to please with almost any décor! Battery operated (not included) with accurate silent sweeping quartz movement. Plastic framework is resistant from moisture and UV-protected glass lens and dial. Equipped with a thermometer and a hygrometer, the clock also assesses and relates temperature and humidity levels to help users protect seedlings from frost, avoid over-watering finicky plants, and take precautions against an icy walkway. To ensure accurate readings, hang the clock in a dry area out of direct sunlight. This clock requires the separate purchase of one AA battery for operation.