With this CRAFTSMAN wireless indoor/outdoor thermometer， you’ll always know the current temperature and humidity levels both inside and out. Updated every 30 seconds， this monitor features precise， reliable temperature and humidity readings from a weather-resistant sensor placed in your own backyard， job site， or wherever your next project takes you. The bold LCD screen displays current indoor/outdoor temperature and humidity readings with trend arrows， daily high and low information， and the date and time. The sleek， modern design allows for perfect placement in any room in both home or office.The display is powered by (3)AAA batteries (not included)， and the sensor is powered by (2)AA batteries (not included). The durable， all-weather sensor has a wireless range of up to 165 feet (50 meters) from the display. Comes with a One-Year Limited Warranty