Description: brand new and high quality Features: Small, lightweight and portable. Professional Multi-function High Precision On-board Compass. Great for marine, vehicle, boating, traveling, hiking, outdoors, etc. The outer tick of outer ring is for CM ruler. The pointer rotating a week is a for cm. The inner tick of outer ring is 1: 50,000 scale, applying to the 1:50,000 map. The outer tick of inner ring is 1: 20,000 scale, applying to the 1:20,000 map. The inner tick of inner ring is 1:5,000 scale, applying to the 1:5,000 map. Specifications: Material: Plastic Color: Yellow+White (As pictures shown) Size: app. 4.5cmx9.6cmx1.65cm/1.77inx3.78inx0.65in Quantity: 1 Pc Instruction: Move the pointer to zero, i.e. at the scale of 1:1. Align the small wheel to the measuring address, slip(rolling) to the destination along the route. According to the map scale, read the number of kilometers on the odemoter. Note: No retail package. Transition: 1cm=10mm=0.39inch Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Map Rangefinder