Soft Leather Case - Keep the handheld altimeter protected with the included soft leather case. Belt loop and attachable lanyard are included with case to make it ultra-portable. Accurate Readings - Adjustable dial lets you account for high or low pressure systems so that you get the most accurate reading possible. The perfect tactical pocket altimeter for hiking, camping, backpacking, or fishing. Battery-Free - This analog altimeter is battery-free and simply adjusts based on the surrounding barometric pressure. More reliable than the more expensive digital watch alternatives. Pair your Altimeter 203 with a Sun Company compass and thermometer for a fully-analog weather/GPS loadout. Easy-to-Read Scale - Easily measure altitude up to 15,000 feet. Barometric pressure is measured in inches of Mercury (Hg). Keep it in your car, truck, or vehicle to keep track of altitude changes while driving. Full Instructions Included - Easy step-by-step instructions help you learn how to set and adjust your Sun Company altimeters/barometers. Measures altitude, up to 15,000 ft., and barometric pressure. Perfect for use as a navigation aid, or to guide you along contour lines. Includes weather trend indicator (shows if weather is improving or worsening). 202 comes with a softside carrying case and lanyard.