[Multifunction Pro Anemometer]Wind Speed, Wind Temperature, Wind Chill, Low battery indicator on bright backlit LCD screen. BT-100 is a portable wind speed guages can accurately measure air speed in 5 units: m/s, km/h, ft/min, knots, mph. Wind Temp in ℃/℉(Degree Celsius/Fahrenheit). [Accurate Wind Meter]Wind Speed Meter for measuring wind speed range 0.67-67.1 mph(+/- 2% of readings), Wind temperature -10-60℃,14℉-113℉(+/-2℃,35.6℉); Resolution 0.1m/s; 0.2℃. 2 temp sensors and 8 vanes makes this air velocity meter is sensitive to measure very low air flow in HVAC installation, duct vent. A good helper in CFM calculation. note:Air Flow in CFM (Q)=Wind speed(V) x Duct Sectional Area(A). [Tripod Hole for Mounting]There's a metal threaded hole on the bottom of the digital anemometer, so you can fix it on a tripod for continuous wind guages. To set your hands free when you fly drones, rc planes, wings, helicopters and quads, long distance . [Anemometer Case Included]It's a light weight, pocket size airspeed Meter, portable and your family to measure outside for outdoor activities, such as: ,Boat Sailing, Kite flying, Climbing, Drone driving etc. [Easy to Use ]Manual / Auto Power OFF optional, Back Light Screen to let you see clear even in dark. 2x1.5V AAA batteries (not included)to get you started when you receive the wind tester. Color: Black Material: ABS Package Contents: 1 x handheld anemometer 1 x storage box 1 x anti-lost lanyard 1 x Chinese and English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.