Car Altimeter Barometer,gps Digital Waterproof Outdoor Altitude Pre-warning Remind, Compass Stopwatch Sports Altimeter-barometer The product is shipped based on the color or size of the main image of the product page. * Multifunctional Design-- The car altimeter barometer uses an altitude sensor chip, which combines the functions of an altimeter, compass, barometer and hygrometer, weather forecast, and flashlight.* For Outdoor Rock Climbing-- The car altimeter barometer is a rechargeable professional altimeter, used for outdoor rock climbing, hiking, hunting, camping and traveling.* Reliability and Water Resistance-- The car altimeter barometer accords with the ergonomic design, the exquisite button structure design, and the use of high-quality materials ensure the reliability and waterproofness.* Support Barometric Pressure, Temperature and Humidity Records-- The car altimeter barometer supports historical high/low altitude, barometric pressure, temperature and humidity records, with time/date display and alarm functions.* Support Height Gain and Loss Calculation Record-- The car altimeter barometer supports height profit and loss calculations and 24-hour historical height data/curve records. In addition, if you have any questions, you can contact us at any time.