Explorer 1 is the smallest anemometer in the world
Durable, no frills, anemometer
Recommended for its value and simplicity
Great for all open-air sports where windspeed is an important factor
Lithium battery allows more than 1 million
Accurate 10 seconds measurements
Impeller housing can be rotated for full protection
Waterproof
Manufactured in Switzerland
Reads in MPH, KPH, Knots, and m/sec

Specifications:

ACCURACY: +/- 3% when aligned with the wind's axis
WINDSPEED: Up to 105 MPH (170 KPH / 60 m/s / 115 KNTS)
MEASURES: 1.2" x 3.28" x .38"
POWER: Lithium Battery good for 250,000 measurements
WEIGHS: 1 ounce
OPERATING TEMP: 14 - 122 F