8-in-1 digital compass, altimeter, barometer, calendar, weather forecast, time, thermometer, and level indicatorDigital compass show directions/bearing in degree and cardinal pointAltimeter range: -700 to 9,000m or -2,300 to 29,500ftThermometer both in C and FClock: 12/24 hoursCalendar: with year month and dateWith backlight functionBattery: 2 AAA batteriesSize: 120 x 76 x 28mmWeight: 182g