Rechargeable Anemometer Handheld, Digital Smart Touch Wind Speed Meter,Portable CFM Wind Speed Gauge for Air Flow Velocity Temperature Measurement,HVAC Wind Anemometer Outdoor(INFURIDER YF-6000GH)

I've been testing this and the Aicevoos AS-H7 to decide which one best met my needs. I didn't notice any problems while testing but, as I was evaluating the features, I found a few problems.First, there is a slight imbalance in the vane (prop) and, when rotating at high speed (e.g. 2500 RPM) it clatters a bit.Second, although the theoretical range for setting volume area (m2/ft2) is 9999, in reality it is limited to 0.001-929.9. Even though I typed in 999.9, it still changed to 929.9. So, although it gives a broad area range, it exhibited that and another error when I was testing the feature where 9.999 turned into 0.999 on saving.Aside from that, I found it easy to use with very few functions that require long keypresses, which is great!It only shows ambient temperature, and no RH%, which isn't a big deal for me.Primarily, it's useful for finding velocity and airflow, plus temperature. It seems accurate and the degree of resolution (how many decimal places) is very good.

The media could not be loaded. .Very good quality design and manufacture. Very sensitive to the slightest movement of air.The included rechargeable battery unit needs to be connected. Unscrew the back panel and insert the connector, replace the back panel and it's ready to go.Speaking of the battery, this unit is a very good value because of the included battery unit. For the price of this device, I usually see units that take several AAA batteries. A VERY good value for the great quality offered.

Overall, it is fairly sensitive to any wind movement. It sense a very slight wind.Quality:The build quality of this Digital Smart Touch Wind Speed Meter is excellent. the overall look and feel is very good. It's well made from top to bottom. It comes with a li-on battery too. But you need to connect it before you use it. By default, it's discounted from the factory. There's a USB C charging port in the front which is very handy because all I have is USB C cable in the house. I don't need to go find a non-usb C cable when I need to charge it. This is a big plus to me.Accuracy:The CFM number doesn't really make sense, sometime the cfm number become extremely large. like 3000+ cfm by blowing to the fan. I don't think my mouth can generate a 3000+ cfm blow. Not sure if there's a calibration is needed. Didn't see any of that from the manual.Conclusion, beside the accuracy issue that I was experiencing. I think it's a very well build anemometer handheld wind speed meter. It catches very slight wind movement.

Affordable. Side grips can be masked off if necessary.Backlight good. Sensitivity good.USB Charging capability puts this basic unit ahead in its category.Highly recommended for quick wind speed and temperature check.