Features: High Accuracy Measurement: MS4525 digital airspeed meter has excellent precision and provides accurate airspeed data. Strong compatibility: For various flight control systems such as INAV and PX4, convenient for users Open source design: Adopts open source design, easy to customize and integrate. Digital Sensoring: Adopts digital signal output to reduce interference and improve stability. Lightweight design: Compact and lightweight, easy to install, without adding too much burden to the aircraft. High performances: Stable data output, suitable for flight environment under various meteorological conditions. Specifications: Item: MS4525 Digital Airspeed Sensoring module Silver Anemometer Tube Length About. 92mm/3.62in Diameter 14mm/0.55in For Flight Control Systems Such As INAV PX4 and more Package Includes: 1Set MS4525 Digital Airspeed Sensoring Module note: Due to problem of lighting effect and shooting, there might be tolerances in product, please understand. Please allow 0-1cm error due to the measurement.