6-in-1 Compass Altimeter Thermometer Barometer Clock Weather Forcast Functions include: Compass, Altimeter, Thermometer, Barometer, Clock and Calendar, and Weather Forecast Can record 256 sets of altitude and barometric pressure data history. With a large LCD display screens LED backlight, convenient to see at night Ideal for motoring, boating, camping, mountaineering, hunting and any other outdoor activities