SUUNTO Observer ST Wrist-Top Computer Watch with Altimeter, Barometer, and Compass (Black) Rugged outdoor watch with built-in altimeter, barometer, and compass Altimeter displays current elevation, shows ascent or descent, and records session Barometer helps you predict changing conditions; 4-day barometric memory Compass offers declination adjustment function and cardinal directions Stainless-steel housing with stainless elastomer strap; weighs 3.53 ounces; 2-year warranty