MaxiMet Marine GMX560 Compact Weather Station with GPS. Measured Parameters: Relative Wind Speed, Wind Direction, Air Temperature, Relative Humidity, Barometric Pressure, 6-Axis Compass Heading, GPS Location, Heading and Speed. Compass allows compensations for tilt and provides pitch & roll data. Derived Parameters: Average Wind Speed & Direction, Corrected Direction, Gust Speed & Direction, True Wind Speed and Direction correcting for misalignment or motion, Height above Sea Level, Dew Point, Wet Bulb Temperature, Wind Chill, Heat Index,  Absolute Humidity, Air Density and Pressure at Sea Level. Outputs: RS232, 422, 485 (ASCII), SDI-12, NMEA, Modbus. Power Supply: 5-30vDC (Consumption 34mA @ 12vDC).