♦Adopt multi-collection device integrated design, easy to install.♦Wind speed and direction are measured by ultrasonic, no angle limit, 360° Omni-directional, and data of wind speed and wind direction can be obtained at the same time. ♦Noise acquisition, accurate measurement, range up to 30dB~130dB.♦Simultaneous acquisition of PM2.5 and PM10, range: 0-1000ug/m3, resolution 1ug/m3, unique dual-frequency data acquisition and automatic calibration technology, consistency up to ±10%.♦Wide range of 0-120Kpa pressure range, can be applied to various altitudes.♦Adopt special 485 circuit, stable communication.