Features: 1. This anemometer is lightweight and portable, which can measure temperature and humidity. 2. Built-in Bluetooth: This meter can be connected to mobile phone and controlled by APP. 3. Supports dew point temperature measurement, wet bulb temperature measurement. 4. LCD screen with backlight: You can read data in dark environment. 5. High precision, low power consumption, stable performance. 6. Applicable for factory, laboratory, warehouse management, food sanitation, air conditioning system, environmental protection and other industries. Specification: Model: WT83B Temperature range & accuracy: -20~70℃(-4~158℉), ±1℃ Humidity range & accuracy: 0-100% RH, ±4% RH Dew point range & accuracy: -20℃~50℃, ±2°C Wet bulb range & accuracy: -20℃~50℃, ±2°C Working current: 13mA , 17mA(Backlight) Bluetooth communication(App): Yes Data storage: 999 groups ℃/℉ Selection: Yes Data hold: Yes MAX/MIN: Yes Auto power off: Yes Alarm set: Yes Power supply: 3*1.5V AAA batteries(Not Included) Item Size: 180*55*30mm/7.1*2.1*1.2in Weight: Approx. 190g / 6.7oz Package List: 1 * Thermometer Hygrometer 1 * User Manual Note: 1. Due to the difference between monitors and light effects, the pictures may not reflect the actual color of the item. 2. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. 1、This anemometer is lightweight and portable, which can measure temperature and humidity. 2、Built-in Bluetooth: This meter can be connected to mobile phone and controlled by APP. 3、Supports dew point temperature measurement, wet bulb temperature measurement. 4、LCD screen with backlight: You can read data in dark environment. 5、High precision, low power consumption, stable performance.