Scalex Map Wheel - Digital map measurer

The Scalex Map Wheel is easy to use: Select the scale factor to match your map. Roll the wheel on the map and read the measurement. Accurate and easy-to-use tool for measuring distance -Affordable tool for RVers, boaters and travelers. -Measures in miles, kilometers and nautical miles. 19 built-in scales to choose from. Option to manually enter your own scales "counter" and "adder" buttons on probe tip allow you to count stops or attractions, or add distances en route. Clear audible tone indicates wheel movement. Automatic shut-off. Uses 2 AAA batteries (included in package)