High Precision Wind Speed Instrument Wind Volume Tester Handheld Wind Speed Meter 1. Measuring range: 0.06-30.0ms 2. Resolution: 0.010.11 3. Wind temperature measurement range: 0-45 degrees Celsius 4. Humidity measurement range: 0-99%RH (TA641B) 5. wind speed display: four-digit display, up to 9999 6. Sensor: infrared laser cutting on the tube method 7. Sampling rate: 2 times sec 8. Automatic shutdown: 10 minutes (can be manually shut down) 9. Power supply: 3 x 1.5V AAA (RO3LRO3) (not included) 10. Operating environment: -10-50 degrees Celsius, 80% relative humidity or less, indoor altitude less than 2000m 11. Storage environment: -10-50 degrees Celsius, within 70% relative humidity (remove the battery) 12. Packing list: main unit x 1, protective cover x 1, cloth bag x 1, manual x1 13. Overall size: about 12.5 x 6.5 x 3.5cm 14. Weight: about 135g Features: 1. 8-piece wind blade design, with low-friction high-precision bearings, more responsive 2. Can lock the maximum value, minimum value, average value and real-time value during the measurement process 3. Upper and lower alarm thresholds can be set, when the measurement is higher or lower than the set threshold, the red background light on the screen will be on and the measured value will be flashing alarm. 4. Analog bar display, unit switchable 5. High definition large screen display with white background lighting