... :ZD-2028/6 in 1Multifunction Digital Altimeter(Incl.Altimeter,barometer,compass.the mometer,weather forecast,time and calendar)·Altimeter-2296 fts to 29500fts.range ... outdoor (motoring,boating,camping,hunting and mountaineering).six functions,digital altimeter,barometer,compass,thermometer,weather forecast,time and calendar, All functions are ...