... and delicate with multifunciton including altimer, barometer, compass, thermometer This digital altimeter is designed small and delicate with multifunciton including altimer, barometer, compass, thermometer,Specification:Altimeter: Range ... -bearing mode display.External magnetic field calibration Magnetic declination setting .High accuracy, + / - 3 degreesThermometer:Thermometer from -10 ~ 60ºC .ºC ...