Manufacturer: Scalex

Price: $29.58 at 1 seller

MapWheel provide a simple, fast and accurate way to measure distances on maps,whether in straight lines or along curves. Just set the MapWheel's scale to match the map, then roll the unit along the route you want to measure. The distance is displayed instantly. MapWheel measures in statuate miles, kilometers, and nautical miles. Portable, uses two AAA batteries (included).