Lanyard string included. Built in magnifier. Ergonomically designed base plate. Precision compass. Accurate. Lifetime magnetized tungsten steel needle. Friction free sapphire bearing. Permanently clear. Anti-static liquid. Proven accurate from -40 degrees to 140 degrees Fahrenheit. Luminous points. Magnifier. This compass features an ergonomically designed base plate, so it fits comfortably in your hand. The extended base plate has inch and 1/10 mile direct reading scales that meet U.S.G.S. Standards. 1:24,000 and 1:62,500 direct reading scales ensure accurate mapping and plotting. 2 dial graduations and built-in magnifier help you read map details. Declination scale lets you make quick adjustments of map bearings to field headings. Silva Explorer 203 Compass (2801030). Silva explorer 203 type 3 compass. Dimension: 2.125" x 4.1875" (inches).