Bluetooth function is added for data transfer and analysis on the mobile application, ienv, which can be downloaded from the app store. It is widely used in mining, electric , iron and steel, petrochemicals, energy saving, shipping, fan manufacturing, ventilation, sportsmen and many other industries. Magnetic induction type of wind speed sensor and ntc sensor of negative temperature coefficient. 12 dynamically wind indicating section eliminates the problem of complex conversion. Dual display of wind speed and temperature. p Features: Built-in bluetooth system, allows data to be exported via bluetooth. Useful for measuring wind speed and temperature. Display LCD display with backlight, easy to read. Data storage, data transmission and wind speed selection. / p Includes wind scale (0 ~ 12) and cooling 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 and manual shutdown function. Compact and lightweight, easy to hold and transport. / p Specifications: Material: ABS plastic Display: LCD display Wind speed range: 0 ~ 30m / s, 1.4 ~ 108km / h, 0.7 ~ 58knots, 0.8 ~ 67mph, 78 ~ 1799.8m / min Wind speed unit: M / S, knots, km / h, mph, ft / min Wind scale: 0 ~ 12 Accuracy: 5% rdg + 0.5 Temperature range: -10 ~ 50 C / 14 ~ 50 C Resolution: 0.1 C / -17.8 C Accuracy: 2 C / -15.6 C Automatic shutdown: 5 min Sampling rate: 0.5s Overload indication: OL Altitude: max. 2000 m Operating temperature: 23 C 5 C ( 80% RH) Storage temperature: -20 ~ 60 C ( lt; = 75% RH) Power supply: 3 * 1.5V AAA batteries (not included) Operation system: Android 4.3, iOS 8.4, Bluetooth 4.0 or above Item size: approx. 16 * 5.1 * 2.7cm / 6.3 * 2 * 1.1 in Item Weight: Approx. 87g / 87.9gram Package Size: Approx. 24 * 12 * 3.5cm / 9.4 * 4.7 * 1.4 in Package Weight: Approx. 145 g / 144.6 gram Package List: 1 * digital anemometer 1 * User Manual (English) 3 * 1.5V AAA batteries Note: this does not include other things, the color is based on the first picture, and the other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thank you!