Pro Air Flow CFM Anemometer: Wind meter accurately measures wind velocity in 5 units: m/s, km/h, ft/min, knots, mph. wind temp in ℃/℉, air flow in CFM/CMM. Allows you to record 600 groups of wind data, and comes with carrying storage case that provides good protection and keep everything together

Higher Range Wind Speed Meter: Higher Wind Speed Range: 0.001 to 100 mph (Accuracy: 3% and 0.2 reading), Resolution: 0.001. Air temperature range 32 to 113 (0-45℃), Resolution 0.1. And also provides Current, Max, Min, 2/3 Max, Average of wind velocity, wind flow readings

Air Flow CFM Meter: BT-846A wind speed gauge measures Wind flow range: CFM 0-999900 ft3/min, Resolution: 0.001-100, Air flow area: 0.001-9999 ft2. You can just set the cross sectional area of the register or vent, the air volume will display in CFM/ CMM synchronously during the air flowing measurement

Separated Extendable Wind Sensor: Built with user-friendly extendable wind sensor vane, so you can still look at the readings easily while you testing balancing the AC or dust collection system. 1.69 x 2.36 inch large Backlit LCD display can help you read the wind changes easily

Air Balancing Applications: Suitable for HVAC trouble-shooting and air flow balancing. The separated wind speed sensor can be replaced if it's broke to increase the service life. Manual or Auto power off after 5 mins without operation to save the battery. If you have any questions or concerns, please don't hesitate to reach out to us

Data Storage and Export Capability: Features 600 groups of measurement data storage with export functionality to PC for detailed analysis and record keeping of wind velocity and air flow measurements over time. BTMETER Pro HVAC Anemometer with fast and effective professional tech support