and high quality Small, lightweight, and portable Professional multi-function high precision on-board compass Ideal for marine, vehicle, boating, traveling, hiking, and outdoor activities Outer tick of outer ring is CM ruler; the pointer rotating a full circle measures one centimeter Inner tick of outer ring is 1:50,000 scale, suitable for 1:50,000 maps Outer tick of inner ring is 1:20,000 scale, suitable for 1:20,000 maps Inner tick of inner ring is 1:5,000 scale, suitable for 1:5,000 maps Instructions: Set the pointer to zero at the 1:1 scale. Align the wheel with the starting point on the map and roll it along the route to the destination. Read the distance in kilometers according to the map scale. Material: Plastic Color: Yellow and White Package Contents: 1 x Map Rangefinder Note: Light and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.