The Extech WTH600-KIT Wireless Weather Station Kit helps plan day-to-day outdoor activities that may be affected by weather conditions including businesses involved with construction, agriculture, and recreation. The WTH600-KIT includes an indoor Wireless Base Station with a large LCD displaying indoor Temperature, Humidity, and outdoor weather conditions, plus date and time. It also comes with an outdoor Wireless Transmitter with 5 built-in sensors, including a self-emptying rain collector for measuring rainfall, wind cups for wind speed, wind vane for wind direction, and temperature and humidity sensors. It sends data by a low power radio frequency to the Base Sation up to 450 ft. (150 m) away. The kit comes assembled for easy installation.