Scalex MapWheel

The MapWheel™ is a simple, fast and accurate way to measure distances on maps or charts. Tool allows RV users, campers, boaters and map enthusiasts to instantly measure distance in miles, kilometers or nautical miles. Easy to use--simply select the scale factor to match your map, roll the wheel on the map and read the measurement. Offers 19 built-in scales to choose from, plus the option to enter other scales manually. Buttons on the probe tip allow you to count stops or attractions, or add distances as you go. Clear audible tone indicates wheel movement. Auto shut-off to save batteries; uses 2 AAA batteries (included).