The SkyScan® Atomic Clock with Wireless Outdoor Temperature uses an indoor/outdoor thermometer with wireless transmitter and a range of up to 82 ft to display the temperature in either Celsius or Fahrenheit. The unit is wall-mounting or freestanding for use as a desktop clock and features a large LCD display. It sets itself by receiving signals from the official U.S. Atomic Clock and automatically adjusts for Daylight Saving Time changes.