The Brunton ADC-Ridge Altimeter will measure altitude from zero to 20,000 feet, and Barometric pressure.

It’s easily calibrated by turning the altimeter scale ring and comes with a click-on lanyard. An ergonomic body design provides great hand-fit both with and without gloves. Operation is battery free, so you don't have to worry about the batteries going dead in the middle of your trip.

Sometimes an altimeter is as important as a compass for navigation and sometimes it's just fun to know your altitude. You can also predict weather trends by reading increases or decreases in the barometric pressure.

Resolution is 200 feet.