["Description:\r\nbrand new and high quality\r\nFeatures:\r\nSmall, lightweight and portable.\r\nProfessional Multi-function High Precision On-board Compass.\r\nGreat for marine, vehicle, boating, traveling, hiking, outdoors, etc.\r\nThe outer tick of outer ring is for CM ruler. The pointer rotating a week is a for cm.\r\nThe inner tick of outer ring is 1: 50,000 scale, applying to the 1:50,000 map.\r\nThe outer tick of inner ring is 1: 20,000 scale, applying to the 1:20,000 map.\r\nThe inner tick of inner ring is 1:5,000 scale, applying to the 1:5,000 map.\r\n\r\nSpecifications:\r\nMaterial: Plastic\r\nColor: Yellow+White (As pictures shown)\r\nSize: app. 4.5cmx9.6cmx1.65cm/1.77inx3.78inx0.65in\r\nQuantity: 1 Pc\r\n\r\nInstruction:\r\nMove the pointer to zero, i.e. at the scale of 1:1. \r\nAlign the small wheel to the measuring address, slip(rolling) to the destination along the route.\r\nAccording to the map scale, read the number of kilometers on the odemoter.\r\n\r\nNote:\r\nNo retail package.\r\nTransition: 1cm=10mm=0.39inch\r\nPlease allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.\r\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\r\n\r\nPackage includes:\r\n1 x Map Rangefinder"]