Product
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Low-cost Hand-held Wind Meter for quick estimates of wind speeds
This hand-held wind speed meter reads low range winds from 2-10 mph and high range from 4-66 mph. The floating white ball on the hand-held meter moves up and down as wind speeds change. Face the back of the hand-held meter towards the wind and the white ball indicates the wind speed. For high range readings hold your finger over the red release valve on top of the meter. USA made.
2013 Master Catalog: Page 484