Precision design, supreme outdoor utility and elegant style blend together to create the eye-catching Core from Suunto. This wriststop has a built-in altimeter that displays your altitude, ascent/descent rate in feet or meters per minute, a barometer that allows you to track overnight changes in barometric pressure and temperature, a compass with semi automatic calibration and digital bearing, a watch with alarms and stopwatch, and a large backlit display that is easy to read. Waterproof up to 100 feet (30 meters).