Skywatch Eole is an anemometer with a large 54 mm propeller which accurately measures the force of the wind regardless of its direction. The Skywatch Eole is powered by two replaceable LR6 batteries. The display is made to the tenth of a unit up to 99.9, then to the unit. The aluminium base gives the camera great strength and the thread (1/4″) under the camera allows it to be attached to a photo tripod.
 
Features
Modes: Current; Avg over 3 secs with one second update; Maximum 
Waterproof
Aluminium bottom plate for tripod attachment 
Low battery indicator 
Swiss official calibration
Protective cap for propeller
Warranty: 1 year
 
Specification:
Units
Km/h, mph, m/s, fps, knots and bft
Resolution
At the 10th up to 99.9, then to the unit
Precision
+/- 3 % from -10° to +50°C
Measuring Range
2 to 150 km/h
Power Source
2 AA Batteries (included) 
Dimensions
155 x 65 x 65mm