GPS Multifunctional Meter Electronic Altimeter Barometer Thermometer Hygrometer Digital Waterproof Compass Item Type: GPS Multifunctional Meter Product Model: FR510 Material: ABS Power Supply: 1 x Lithium Ion Battery 230mAh(built in) Charging Voltage: DC 5V Height: Measuring Range: -700 to 9000 meter (-2296 to 29500 ft) Accuracy: 1m/ft Function: Maximum and minimum height records, 24 hours of historical height records have been plotted Height Gain and Loss Calculation Range: 44999m/ft Function: Sea level height setting, height change warning, target height warning. GPS distance, speed, vertical lift rate, return recording Air Pressure: Measurement Range: 300hpa to 1100hpa (8.84inHg to 32.44inHg) Accuracy: 0.1hpa (0.01inHg) Function: Historical pressure curve of the past 24 hours Weather Forecast: Clear, cloudy to clear, cloudy, rainy Function: Barometric trend arrow indication, sea level pressure setting Temperature and Humidity: Temperature Measurement Range: -20℃-60℃ Humidity Measurement Range: 20%-95% Function: ℃ ℉ unit switching, maximum and minimum temperature and humidity recording Time: Hours, minutes, seconds Date: Year, Month, Day, Week Time Function: Alarm function, period setting GPS Return: Direction, distance, speed, GPS return point settings Compass: Direction display, angle display, magnetic declination setting Product Features: 1. GPS Beidou dual system compatibility, dual star locating function, speed, distance, 9 sets of return and return records 2. Height gain and loss, 7x24 hours of historical height data and curve recording 3. Height change interval prompt, 4. Height target reminder setting 5. Historical height data analysis, temperature and humidity records. 6. 24 Hour Pressure Trend Curve Display 7. 16 Directional electronic compass function 8. Temperature, humidity, time, date, alarm clock, flashlight function 9. IPX4 waterproof grade