This is the watch with a barometer, altimeter, compass, and thermometer, keeping you constantly abreast of conditions while you engage in outdoor adventures. The barometer provides a precise digital readout in either inches of Mercury (inHg) or Millibar//HectoPascals (mbar/hpa). A graphic display shows pressure change trends. The altimeter uses barometric pressure and accepts daily calibration to a known altitude to provide enhanced accuracy. It registers elevations from -2,296' to +29,520' to within one foot, and sounds its alarm when you reach a pre-determined altitude. It also stores data to later show your ascents and descents while hiking, running, skiing, or cycling. The digital compass is accurate to within a single degree and it displays both bearing and degrees. The thermometer shows temperature in Fahrenheit or Celsius and the watch displays two time zones at the touch of a button in 12- or 24-hour mode. Its sapphire glass crystal is tough enough to survive grueling journeys without scratching. Rugged polyurethane band and stainless case. 1/2" H x 1 3/4" Diam. (8 oz.)