Portable Digital Wind Speed Meter Air Volume Tester 1. Measurement mode: integrated type (TA642C: split type) 2. Wind speed: Measuring range: 0.06-30.0ms; 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: 15 minutes (can be manually shut down) 9. Power supply: 3 x 1.5V AA (LRO6) (not included)Micro USB direct insertion 10. Data storage: 1000 11. Operating environment: -10-50 degrees Celsius, 80% relative humidity or less, indoor altitude of less than 2000m 12. Storage environment: -10-50 degrees Celsius, within 70% relative humidity (remove the battery) 13. Packing list: main unit x 1, cloth bag x 1, manual x 1, data cable x 1 (TA641B) 14. Overall size: about 23.9 x 7.3 x 3.5cm 15. Weight: about 210g Features: 1. Multiple measurement functions, can switch between different measurement units 2. 8 wind blades design, with low-friction high-precision bearings, more responsive 3. 1000 sets of data can be recorded and viewed directly on the machine; TA642B can export and generate charts by communicating the data recorded by the host computer with the computer software via USB interface 4. Upper and lower alarm thresholds can be set, when the measurement is higher or lower than the set threshold, the screen red background light is on and the measured value flashes alarm prompts 5. VA high-definition color screen display, with background lighting