Can this be used to measure air from a floor air vent in an A/C system

If you mean the air flow (speed), then the answer is YES. If you mean the temperature of the air, then the answer is NO (because it is not accurate when it comes to temperature)

what is the purpose of the USB cord?

HOLDPEAK told me that the USB port on the back of the HP-866B-APP is only to provide power to the unit if the batteries are dead or missing, but not for data transfer.

does this have a screw on the bottom to attach to the tripod

Dear kcarter,Hello.I am Cindy from Holdpeak sales support.Yes!Our 866B anemometer comes with a carrying strap which screws into the bottom or you could mount it in a tripod.I hope my answer will be helpful!

I received mine today. Is there any way to adjust the contrast of the display? I can't hardly read mine.

No contrast adjustment that I know of but there is a back light. But there is a back light that might help. Check your battery. It is a bit sensitive to your viewing angle so hold it directly in line with your eyes. But I repeat, check your battery.

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🌬️ Stay ahead of the breeze — measure like a pro, anywhere, anytime!

MULTI SCENARIO READY - Perfect for drone pilots, sailors, HVAC pros, and outdoor enthusiasts craving reliable airflow insights.
HANDS FREE SECURE USE - Tripod mount and hand strap ensure stability and safety during dynamic outdoor activities.
PRECISION WIND ANALYTICS - 8-vane sensor + dual temp sensors deliver highly accurate wind speed, chill, and temperature readings.
VERSATILE UNIT SWITCHING - Effortlessly toggle between m/s, km/h, mph, knots, and more to suit your professional needs.
SEAMLESS BLUETOOTH CONNECTIVITY - Monitor real-time & historical wind data remotely via intuitive app integration.

The H HOLDPEAK HP-866B-APP is a professional-grade handheld digital anemometer featuring Bluetooth app connectivity for remote monitoring, an 8-vane sensor for precise wind speed and temperature measurement, a backlit display for all-light conditions, and versatile unit options. Designed for outdoor and HVAC applications, it offers hands-free operation with a tripod mount and secure hand strap, making it an essential tool for accurate airflow and wind chill analysis.

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TrustScore 4.5 | 7,300+ reviews

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Customer service was outstanding when I had questions about the product.

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Sensor Technology	Temperature
Are batteries included?	Yes
Display Type	LCD
Upper Temperature Range	122 Degrees Fahrenheit
Connectivity Technology	Bluetooth
Number of Batteries	2 AAA batteries required. (included)
Power Source	Battery Powered
Additional Features	Remote Monitoring, Tripod Hole, Hand Strap

H HOLDPEAK HP-866B-APP Digital Anemometer Handheld Vane Wind Speed Meter, APP Connect for Measuring Wind Speed, Temperature, Wind Chill with Backlight (Blue)

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