Dwyer Instruments WIND METER-KNOT

Ideal for yachtsmen, outdoors men, farmers, etc. A welcome gift. Use anywhere. Direct reading, no calculations. Hold meter at eye level, back of unit to wind. White ball in tube indicates wind speed. Meter has two scales for maximum accuracy and easy reading - low, 2-10 and high, 4-66 mph range. For high range, cover hole with finger. Pocket size, sturdy plastic, has case.