Bluetooth function is added for transferring data and analysis on the mobile app, ienv, which can be downloaded from app store. It is widely used in mining, electrical, iron and steel, petrochemicals , energy saving, navigation, fan manufacturing, ventilation, sports and many other industries. Magnetic induction type wind speed sensor and NTC negative temperature coefficient sensor. 12 winds Dynamically indicating section eliminates the complex conversion problem. Dual display of wind speed and temperature. Features: Built-in Bluetooth system, allows data export by Bluetooth. Useful for measuring wind speed and temperature. LCD screen display with backlight, easy to read. Data storage, data transmission and wind speed selection. 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, auto and manual shut-off function. Compact and lightweight, easy to hold and carry. 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: -10~50C/14~50C Resolution: 0.1C/-17.8C Accuracy: 2C / -15.6C Auto shut-off: 5 min Sampling rate: 0.5s Overload indication: OL Altitude: max.2000 m Operating temperature: 23C 5C ( 80% RH) Storage temperature: -20 ~ 60C (andlt;=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 * 5.2 * 2.7 cm/6.3 * 2 * 1.1 in Package List: 1 * Digital Anemometer 1 * User Manual (English)