La Crosse Technology's 18 Inch Quartz Wall clock is weather resistant and tracks temperature and humidity. 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. Surrounded by a sleek pewter-painted plastic frame, the clock face features black 1-1/6-inch-high numbers for easy visibility. Elegant, black metal hands tick off the hours and minutes. For temperature and humidity readings, the clock face displays two small analog gauges. The hygrometer gauge measures from 1 to 99% relative humidity, while the temperature gauge gives readings for temperatures from -10 to 130°Fahrenheit, or -30 to 60°Celsius. To ensure accurate readings, hang the clock in a dry area out of direct sunlight. This accurate quartz time clock requires the separate purchase of one AA battery for operation. A one-year limited warranty covers this item. The clock measures 18 inches wide by 2-1/4 inches deep by 18 inches high and weighs near 5 pounds upon shipping.