Main Functions：Basic positioning, measuring azimuth, deflection angle, it's easy to read data in all weather at any time. excellent for camping, hiking, exploring, and other outdoor activities. Easy to carry：The compass is medium in size and easy to carry. It is recommended to put it in your pocket, backpack or directly on your neck so that your direction will always be correct. Applicable occasions and people：This compass is waterproof and shockproof, suitable for driving, camping, hiking, so this compass is a good tool for backpackers, campers, hikers, hunters, geologists to do outdoor activities. Product material: ABS shell, metal fittings, white oil Product weight: 22 grams (product net weight), 28 grams (including packaging) Product size: 77*53* 12mm Packing size: 78*55* 1 7mm Dial diameter: 32mm (odometer), 18mm (compass) Product features: four proportional scale modes 1: 1 original ratio (outer circle), 1: 50000, 1: 20000, 1: 5000. You can choose different scale scales according to the actual length, just use the pulley at the front of the body. Move along the path from the starting point to the end point on the map, and then measure the actual distance between the two places according to different scale standards. quantity: 1 Ensure safe travel.