Altimeter range up to 9000 m (29,500 ft.). Measures vertical speed. Logbook function lets you record vertical ascents and descents, plus the number of runs skied. Barometer also displays pressure-related data for the past four days, as well as present sea level pressure. Electronic compass displays bearings with 3-degree accuracy. A nicely equipped timepiece and then some, Suunto X-Lander Watch also houses an altimeter, barometer, electronic compass, and a complete calendar clock. Use the altimeter to check your summit, including treks up to the world's highest mountain peaks. The barometer keeps you in tune with current pressure and temperature readings, and the compass keeps you on the right path. A complete calendar clock helps you remember birthdays and special occasions, right up to the year 2089. . . . . . Declination adjustment function corrects the difference between true North and the magnetic North . Watch has 3 daily alarms, stopwatch with split time measurement, and countdown timer . Mineral crystal glass face . Water resistant up to 000 meters/300 feet . Black aluminum casing and black rubber strap .