EZON H001 Climbing Hiking Watch Waterproof Outdoor Sports Watch with Compass Thermometer Barometer Altimeter Wristwatch for Men An altimeter tracks your vertical movement, a barometer tells the Trend in air pressure, and a compass points the way. It can predict weather by the changes of the pressure trend, the weather forecast includes sunny, overcast, cloudy, rainy. It can display 40 cities sunrise and sunset time and contains 48 cities local time in the 24 time zone. It contains 50 years (2010-2059) automatic calendar. Week will calibrate automatically since year, month and date have been setting. It has 5 sets of alarm and hourly chime function. Alarm-1 to alarm-3 are daily or workday alarm. They can use as reminder for special day.