Feature: 1. Multifunctional: This digital anemometer has multiple functions, which can be used to measure wind speed, wind temperature, wind volume, and can be switched to different measurement units. 2. 8 Blades Design: This digital anemometer is designed with 8 blades with low friction high accuracy bearings for more responsive. 3. Multiple Value Display: This digital anemometer can lock the maximum, minimum, average and real time values during the measurement. 4. Settable Alarm Valve: This digital anemometer can be set up with alarm thresholds for upper and lower limits of wind speed. When the measurement is higher or lower than the set threshold, there will be a buzzer alarm sound, as well as the alarm prompt light flashing. 5. Small And Portable: This digital anemometer is small and lightweight, which makes it very convenient to carry around and measure outdoors. Specification: Item Type: Digital Anemometer Model: TA642C Material: ABS Measurement Mode: Split Type Wind Speed Measurement Range: 0.06-45.0m/s Accuracy: 0.2 + (2% Reading) Resolution: 0.01/0.1/1 Wind Temperature Measurement Range: 0-45C (32.0-113.0F) Accuracy: 2C (3.6F) Resolution: 0.1/1 Wind Speed Display: 4 Digit Display, Maximum 9999 Sensor: Infrared Laser to Tube Cutting Method Sampling Rate: 2 Times/s Repeat Test: 2% Data Storage: 1000 writes Firmware Update: Synchronized PC Update Product Firmware Upgrade (Specifically refer to the PC. Upper Computer Software ) Automatic Shutdown: 15 Minutes ( Can be manually shut down ) Use Environment: -10 ~ 50 C, Maximum 80% Relative Humidity, Indoor Altitude