Track your outdoor weather. Professional Weather Center displays temperature, wind, rain, and pressure readings with a 12hour historical graph. Wireless Thermo-Hygro Sensor transmits temperature, wind and rain information with Instant Transmission (state-of-the-art wireless technology designed & developed by La Crosse Technology) to the base unit and has a transmission range of 330 ft. Customize it to your preferences from the wind speed settings: Mph, Km/H, M/S, or Beaufort scale, and rain total settings: inches or mm. Also, features a programmable Hi wind alarm. In addition, This Weather Center stores up to 200 historical sets of Weather Data recorded within 3 hour intervals and storm warning alarm to warn you of bad weather coming. Packed full of features: MIN/MAX values for Out Temp & Humidity & Wind plus programmable alarms, Barometric pressure and 3 Icon Weather Forecast and tendency arrows. Manual Set 12/24 Hour Time display with Calendar and alarms. Wireless Technology packed with convenience.