Maretron's outdoor weather station measures wind speed and direction, air temperature, barometric pressure, and relative humidity. The wind measurement is performed using ultrasonic sensors, which means there are no moving parts to wear out or to get caught in the rigging. The WSO200 accurately measures wind speed and direction under tilt of up to 30 Degree, making it ideal for sail as well as power conditions. When used with Maretron's SSC300 compass and a display such as Maretron's N2KView vessel monitoring system, or Maretron's DSM570 color graphics displays, the user will be able to view both apparent and true wind speed and direction as well as dew point and wind chill factor.• Compatibility: Maretron's SSC300 Compass/ N2KView Vessel Monitoring System• Dimension: 5.91 Inch Diameter X 4.85 Inch Height• Input Voltage: 9 To 32 Volt• Input Current: 50 mA• Operating Temperature: -25 Degree Fahrenheit To 55 Degree Fahrenheit• Material: Plastic• Waterproof Rating: IP67 Rating Waterproof• Includes: With Mounting Bracket Not Affected By The Common Issues Such As Bearing Wear, Salt & Dirt Build-Up, Or Bird Perching That Can All Result In Failure Or Data Inaccuracy Mounts On A 1 Inch To 14 Standard Marine Mount & Is Waterproof To IP67 Standards | Maretron Weather Receiver Antenna