Feature: 1. Multifunctional: This anemometer is versatile enough to measure wind speed, airflow and temperature, which can help you with HVAC installations, CFM calculations and duct vents. 2. High Accuracy: This anemometer is highly accurate and can measure wind speed range 0.9 to 67.0mph (resolution 0.1mph) and temperature range 32℉ to 140℉ (0℃ to 60℃). 3. Multiple Unit Conversion: This anemometer can measure different wind speeds, such as maximum wind speed and current wind speed, and can be switched to five wind speed units: m/s, MPH, FPM, KNT, KPH. 4. Portable And Easy To Use: This anemometer is small in size and light in weight, making it very easy to carry around and use. 5. Wide Application: This anemometer has a wide range of applications and can be used in wind energy, fan manufacturing, ventilation engineering and other fields. Specification: Item Type: Wind Speed Meter Material: ABS Battery: AAA Battery x 3 ( Shipped Without Battery ) m/s: 0.4-30.0m/S, ±3%+0.3m/ms km/H: 1.4-108km/h, ±3%+1.0km/h NPH: 0.9-67.0mph, ±3%+0.4mph Knots: 0.8-58.0knots, ±3%+0.4knots ft/min: 80-5900ft/min, ±3%+40ft/min ℃, ℉: 0-60℃, 32℉-140℉ Air Velocity Rating: 0-12 Air Volume Measurement: CMM/0-9999, CFM/0-9999. Package List: 1 x Wind Speed Meter1 x Manual