Indoor and outdoor decorative metal thermometer. This item is a high-quality temperature measuring instrument. This decorative thermometer compliments any decor. Try this in a window. Mount on wall using the 2 screws included. For the most accurate temperature readings choose a location that will not be exposed to direct sunlight or other direct heat sources. Do not hang in direct sunlight. The Acu-Rite name assures the utmost in quality and fashion and years of accurate time and temperature measurement. Limited warranty. 3.5" round. Aged brass.