1、Polycarbonate shell, high mechanical strength, high hardness, corrosion resistance, no rust can be used outdoors for a long time. 2、8 indication directions, high-performance bearings, small rotational resistance, accurate measurement, more convenient and practical. 3、Small and light in size, easy to carry and assemble, anti-electromagnetic interference treatment, can be applied to both four-wire and three-wire connection. 4、Anti-exposure, high impact strength, and with the internal smooth bearing system to guarantee the accuracy of information collection. 5、Widely used in the measurement of wind direction in greenhouses, environmental protection, weather stations, ships, terminals, breeding and other environments.