Brand: DAVIS Manufacturer's Part Number: 271 Part Type: Wind Speed Meters Product Line: Davis Instruments Wind Speed Meters Summit Racing Part Number: DVI-271 UPC: 011698027101 Measures Current Wind Speed: Yes Measures Average Wind Speed: No Measures Maximum Wind Speed: No Wind Speed Range (mph): 0.0-99.9 Measures Altitude: No Measures Temperature: No Measures Temperature with Windchill: No Measures Temperature with Heat Index: No Measures Relative Humidity: No Measures Relative Humidity with Dew Point: No Measures Barometric Pressure: No Displays 16 Hour History Barometer Bar Graph: No Storm Audio Alert: No Replaceable Plastic Impeller: No Water Resistant: No Includes Lanyard: No LCD Readout: No Backlit: No Power Supply: Three AAA batteries Batteries Included: No Quantity: Sold individually. Notes: LEDs display speed in mph， knots， f/m， or meters/second. 2.6 in. W x 4.7 in. H. Davis Instruments Wind Speed Meters Davis Instruments Wind Speed Meters provide the versatility and convenience required by wind professionals and casual observers alike. Their Wind Wizards are handy analog meters that are both economical and clever. These compact gadgets are just right for casual wind watching. They even read in the Beaufort scale! They're mechanical--there's never a battery to replace!Grab your Davis Instruments Wind Speed Meters from DX Engineering and hold the information you want in the palm of your hand!