Wireless weather station provides you with precise real-time weather data straight from your own backyard. Monitors the indoor room temperature, receives wireless outdoor temperature, humidity levels, tracks trends, and sets customizable alerts from an all-in-one convenient device. View the current heat index and dew point, along with current moon phase. Displays time with calendar and indicates when batteries are low. Includes a weather resistant temperature TX141TH-B sensor to send wireless transmission over 330 feet (100m) in open air, straight to your indoor weather station, and will read below -40°F. Battery operated weather station requires 4 AA (not included) batteries. View your backyard weather at your convenience with up to the minute data.