The new anemometer option measures both wind speed and direction using ultrasonic signals calibrated with temperature. No moving parts add even more ruggedness and reliability, with minimal maintenance. Solar-powered with battery backup. Compatible with all Vantage Pro2 Sensor Suites, EnviroMonitor Nodes, and Sensor Transmitters. Includes mounting hardware, battery, aligning tool, and 40 ft. (12 m) cable.