SUUNTO Observer TT Wrist-Top Computer Watch with Altimeter, Barometer, and Compass (Titanium) Altimeter, barometer, and electronic compass in one One-third smaller than earlier Suunto models Premium titanium housing with a titanium wristband Altimeter with improved logbook displays and records simultaneously; 3 alarms, stopwatch, and countdown timer Shock resistant, waterproof; Electroluminescent backlight