Features: Built-in Bluetooth system, can export the data by Bluetooth. Helpful for measuring wind speed and temperature. LCD display with backlight, easy for reading. Data storage, data transmission and the current wind speed selection. Includes wind scale(0～12) and windchill indication. With maximum and average value measurement. Wind speed unit is switchable: m/s, km/h, Knots, mph or ft/min. Temperature unit is switchable: Celsius(°C) or Fahrenheit(°F). Low battery indication, automatic & manual power off function. Compact and light, convenient to hold and carry.