8-in-1 digital compass, altimeter, barometer, calendar, weather forecast, time, thermometer, and level indicator Digital compass show directions/bearing in degree and cardinal point, with backlightAltimeter range: -700 to 9,000m or -2,300 to 29,500ftThermometer both in C and FClock: 12/24 hours Calendar: with year month and date With backlight function Battery: 2 AAA batteries Size: 90 x 50 x 18mm Weight: 48g