This device is the ideal companion for outdoor (motoring ,boating camping ,hunting and mountaineering ). It features with six functions like altimeter ,barometer, compass, thermometer ,weather forecast, time and calender display. All functions are displayed on the LCD back light. It is very easy to use and carry. Features: 6 in 1 multifunction design Can be altimeter ,barometer, compass, thermometer ,weather forecast, time and calender display Altimeter