This brand new 6 in 1 blue LED backlight digital compass, integrates the functions of altimeter, barometer, electronic compass, thermometer, weather forecast and time. Small size, light weight, portable and useful, ideal companion for outdoor activities lovers Altimeter mode: -2,296 ft - 29,500 ft range (relative height measurement, reference setting required) Resolution: 1 meter or 3 ft Barometer mode: 300mbar - 1100mbar range Resolution: 1mbar Compass mode: 4-bearing mode display Magnetic declination setting Accuracy: +/- 1 degree Resolution: +/- 1 degree Thermometer mode with choices of selection: ?C and ?F Durable for -10 °C to 60 °C or 14 °F to 140 °F 0 °C or °F selectable Resolution : 1 °C Weather Forecast weather forecast for next 12 to 24 hours 4 weather status indication: Sunny, Slight sunny, Cloudy, Rain Time Mode Time format: 24H Time display mode: hour, minute, second Easy to use, easy to carry with the detachable neck strap Low battery indicator LCD display: 37mm (diameter) or 1.5"(diameter) Display with Super Bright LED backlight Powered by 1 CR2032 3.0V Lithium Battery (Included) Dimension: 66mm x 55mm x 15mm or 2.60" x 2.17" x 059" Package content : 1x Multi Function 6-in-1 Digital Compass Weather Altimeter 1x CR2032 3.0V Lithium Battery