Feature:1. [8 BLADES DESIGN] The handheld anemometer is designed with 8 blades, the low friction bearing to ensure high accuracy and sensitive response.2. [VALUES LOCKING] The maximum, minimum, average and real time values in the measurement process can be locked, stable and reliable.3. [THRESHOLD ALARM] When it is higher or lower than the set threshold value, the red light will be on for a long time, the measuring value will flash to alarm.4. [MEASURING RANGE] The measuring range of the anemometer is 0.06-30.0m/s, with high accuracy and fast sampling rate, and wide application range.5. [DIGITAL DISPLAY] The anemometer adopts 4 digit display, with a maximum of 9999, automatic shutdown without operation for 10 minutes.Specification:Item Type: AnemometerMaterial: ABSColor: BlackMeasuring Range: 0.06-30.0m/sAccuracy: 2% readingWind Speed Display: 4 digit display, maximum 9999Sensor: Infrared laser tube cutting methodSampling Rate: 2 times per secondAutomatic Shutdown: 10 minutes (can be closed manually)Operating Environment: -10-50, maximum 80% relative humidityIndoor Altitude: < 2000 meter / 6561.7ftStorage Environment: -10-50, maximum 70% relative humidity (take out the battery)Display Size: Approx. 37 x 41mm / 1.5 x 1.6inBattery: 3 x 1.5V AAA Battery (not included).Package List:1 x Anemometer1 x Cloth Bag1 x User Manual