Note: The parcel will be sent without battery ,The battery type is 3V CR2032 environmental Lithium battery Product details This anemometer is very small and light. It is an idea tool compatible for windsurfing, sailing and kite flying. You can also use it compatible for measuring speed and temperature of CPU computer fans, air-conditioners, airflow over the roof or walls. Characteristic & Function 1.Measure Wind Speed&Temperature 2.Wind Speed range:0-30m/s 3.Wind temperature range:-10-45C 14-113F 4.Wind speed measure in mph,M/s, Km/h, ft/min, Kn 5.Temperature display in C/F 6.Wind speed in Beaucompatible for t wind scale bar graph 7.Wind chill display 8.Large LCD display with backlight. 9.Auto power off 10.Data hold function. 11.Neck band include 12.3V lithium battery operation battery is not included Specification Measuring items:Air velocity Wind speed, Air temperature Range of Air velocity:0~30m/s, 0~90km/h, 0~5860ft/min, 0~55knots, 0~65mph Accuracy of Air velocity:5% Range of Air temperature:-10-45C 14-113F Accuracy of Air temperature:2C 3.6F Resolution of Air velocity:0.1m/s, 0.2C Battery:CR2032 not included Thermometer:NTC thermometer Operating temperature:-10-45C 14-113F Operating humidity:Less than 90%RH Store temperature:-40 ~+60 -40 F~140F Current consumption:Approx. 3mA Weight:52g Dimension:40x18x105mm