Whatever the weather, wherever you are on the earth, no batteries required. With patented construction using a unique needle and magnet solution, Suunto field compasses are a reliable partner when you are out and about. Patented Global Balanced Needle makes the compass reliable in all parts of the world and in any temperature from -30 to +60 degrees Celsius. Scratch resistant and hot-stamped base plate, vacuum oil filled capsule and steel needle with sapphire bearing make Suunto compasses the most robust in the world. All Suunto compasses are made in Finland and have two years warranty.This has adjustable declination correction, luminous bezel, magnifying lens and marking holes. There is also declination adjusting tool in the lanyard.