Wind Speed Meter 3000

These meter feature a large, 1” impeller mounted on a sapphire jewel bearing, which means it starts rotating with the slightest puff of air – 0.3 mph! And this unique patented user-replaceable impeller can easily be replaced if it is damaged or worn. Included slip-on protective cover, neck lanyard, CR2032 coin cell battery and Certificate of Conformity.