The brilliant white background is designed to enhance the black letters offering more visibility and simplicity. The numbers are placed on the thermometer with a special UV resistance to keep their color and brilliance against outdoor elements. Temperature readings are in Fahrenheit and Celsius ranging from -60 degrees F to 120 degrees F to ensure your temperature range needs are met. The bold numbers are not only extra-large but easily read from a distance.. The thermometer easily mounts with a built-in bracket on any wall, fence, or patio for quick installation.