SUUNTO Core Extreme Collector's Edition Watch with Altimeter, Barometer, Compass, and Depth Measurement Wrist-top computer watch with altimeter, barometer, compass, and weather indicator Altimeter displays current elevation (up to 30,000-feet), shows ascent or descent, and records session Intelligent storm alarm senses drops in air pressure and notifies you of approaching storms Barometer helps you predict changing conditions; built-in weather trend indicator Accurately measures depth to 32.8-feet; 2-year warranty