WTH600-KIT is a Professional Weather Station with Integrated 5-in-1 Sensor. The wireless 5-in-1 sensor contains a self-emptying rain collector for measuring rainfall, anemometer, wind vane, temperature and humidity sensors. It is fully assembled and calibrated for your easy installation. It sends data by a low power radio frequency (915MHz) to the Display Main Unit up to 450 ft (150m) away (line of sight). The Main Unit also displays Indoor Temperature/Humidity, Dew Point, and Barometric Pressure.