Night light, you can read in low light. Gem bearing, internal vacuum package. Positioning is more accurate and rapid, greatly improving service life It can still work normally at higher or lower temperatures. The reinforced shell is effectively shockproof. The compass inner is vacuum-sealed, and it is waterproof up to 15 meters. Outdoors, you need a compass to be able to orientate at any time, and it will help you when you get lost. Name: Mini North Arrow Shell: titanium alloy/brass optional Inner shell: polycarbonate made in China Size: 22mm in diameter and 8mm in thickness Weight: copper 17.6g titanium 9.5g Precautions: Please use it as horizontally as possible to better ensure accuracy. In order to avoid confusion of the magnetic needle, please keep a certain distance from the magnetic object (compared to (Such as high-voltage lines, generators, speakers, magnets, etc.). Applicable occasions and people,This compass is waterproof and shockproof, suitable for driving, camping, hiking, adventure, and other outdoor activities, so this compass is a good tool for backpackers, campers, hikers, hunters, geologists to do outdoor activities. 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. Compass is an ideal outdoor navigation tool.