Multifunction Digital Compass with Altimeter, Barometer, Thermometer, Weather Forecast, and Clock Key Specifications/Special Features: Altimeter: Range: -2,296 to 29,500ft Resolution: 1 meter or 3ft Barometer: 300 to 1,100mbar range Resolution: 1mbar Sea level pressure manual setting Weather forecast: For next 12 to 24 hours 4 weather status indications, sunny, slight sunny, cloudy and rainy Electronic compass: 4-bearing mode display External magnetic field calibration High accuracy: ±3 degrees Resolution: ±3 degrees Thermometer: Temperature: -10 to 60 degree Celsius Resolution: 1 degrees Time: 24-hour format clock display hour, minute, second Backlight: 5-second super bright LED backlight