SUNROAD Digital Altimeter Compass Thermometer Barometer 8 in 1-699~8991m Altitude LCD Multifunction of altimeter, barometer, thermometer, compass, weather station and time Wide measuring range of altitude -699.8~8991.6m (-2296~29500ft) Wide measuring range of air pressure -300 ~ 1100mbar Weather forecast for next 12 to 24 hours IPX4 waterproof