Multifunctional Digital Barometric Altimeter Compass Weather Forecast Thermometer Hygrometer Barometer, by SUNROAD

Altitude total gain/loss, 24 hours altitude record and trend chart, 24 hours air pressure trend chart.
Incorporate altimeter, barometer, compass, thermometer and hygrometer functions etc.
Max/Min altitude, temperature, humidity record.
Time, date, alarm clock functions. IPX4 waterproof.
Built-in rechargeable battery.