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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Our Other Brands:Hewyn|Selfship

866B Bluetooth Anemometer

Product ID: 376803040

Details

Brand
H HOLDPEAK
Material
Acrylonitrile
Item dimensions L x W x H
16.5 x 8.5 x
Item weight
0.44 Pounds
Manufacturer
H HOLDPEAK

📶Bluetooth APP remote monitoring

🌡️Dual temp sensors for wind chill

🌬️8-vane ultra-precise wind speed

Description

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

MULTI SCENARIO READY - Perfect for pros and enthusiasts in surfing, drone flying, HVAC, boating, golf, and more.
PRECISION ENGINEERING - 8 vanes and smooth fan shaft deliver highly accurate wind speed and chill readings.
HANDS FREE CONVENIENCE - Tripod mount and secure hand strap keep your device steady and safe during any outdoor adventure.
VERSATILE UNIT SWITCHING - Effortlessly toggle between m/s, km/h, mph, knots, and temperature units (℃/℉) to suit your needs.
SEAMLESS BLUETOOTH CONNECTIVITY - Monitor real-time & historical wind data remotely via intuitive mobile app.

The HP-866B-APP Digital Anemometer is a professional-grade handheld wind meter featuring Bluetooth app connectivity for remote monitoring, 8 precision vanes for accurate wind speed measurement, and dual temperature sensors to capture wind chill. Its versatile unit options, backlit display, and tripod compatibility make it an essential tool for outdoor enthusiasts and HVAC professionals alike.

Specifications

ASIN	B01LWU5MM0
Best Sellers Rank	#7,457 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #2 in Wind Speed Gauges
Brand	H HOLDPEAK
Brand Name	H HOLDPEAK
Customer Reviews	4.1 out of 5 stars 212 Reviews
Included Components	anemometer, screwdriver, battery, manual, lanyard, protective case
Item Dimensions	6.5 x 3.35 x 1.5 inches
Item Weight	7.04 ounces
Item dimensions L x W x H	6.5 x 3.35 x 1.5 inches
Manufacturer	H HOLDPEAK
Material	Acrylonitrile Butadiene Styrene (ABS)
Material Type	Acrylonitrile Butadiene Styrene (ABS)
Warranty Description	1 year

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The product quality is outstanding. Exactly what I needed for my work.

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