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Rugged roller wheel for accurate measurements
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Clear audible tone indicates wheel movement
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Easy-to-read displays shows length, count and scale factor simultaneously
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Count and ADD button
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Simple controls
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19 built-in user scale factors including all common map scales
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Measures in miles, kilometers and nautical miles
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Counter and adder buttons on probe tip let you count stops made or add fixed destination lengths as you measure
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Calculate auto-scale factor from reduced, enlarged or odd-scale maps
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Create, store and retrieve user scale factors
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Automatic shut-off assures long battery life
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Low battery indicator