Feature 1FUNCTIONS: The multifunction meter integrates GPS, altimeter, barometer, compass, thermometer, hygrometer, time, alarm clock and LED flashlight functions. 2HIGH ACCURACY: This electronic meter uses high accuracy sensor to ensure accurate and reliable detection results, improving travel security and convenience. 3RECORDING FUNCTION: With total height gain and loss, 24 hour height records and charts, maximum and minimum height, temperature and humidity recording. 4IPX4 WATERPROOF: The GPS altimeter has IPX4 waterproof grade, which is very suitable for outdoor travel, camping, adventure, mountaineering, etc. 5POWER SUPPLY: Equipped with a 230mAh lithium ion battery and charging cable, convenient for power supply, easy to use anytime and anywhere.Item Type: GPS Multifunctional MeterProduct Model: FR510Material: ABSPower Supply: 1 x Lithium Ion Battery 230mAh(built in)Charging Voltage: DC 5VHeight: Measuring Range: -700 to 9000 meter (-2296 to 29500 ft)Accuracy: 1m/ftFunction: Maximum and minimum height records, 24 hours of historical height records have been plottedHeight Gain and Loss Calculation Range: 44999m/ftFunction: Sea level height setting, height change warning, target height warning.GPS distance, speed, vertical lift rate, return recordingAir Pressure: Measurement Range: 300hpa to 1100hpa (8.84inHg to 32.44inHg)Accuracy: 0.1hpa (0.01inHg)Function: Historical pressure curve of the past 24 hoursWeather Forecast: Clear, cloudy to clear, cloudy, rainyFunction: Barometric trend arrow indication, sea level pressure settingTemperature and Humidity: Temperature Measurement Range: -20-60Humidity Measurement Range: 20%-95%Function: unit switching, maximum and minimum temperature and humidity recordingTime: Hours, minutes, secondsDate: Year, Month, Day, WeekTime Function: Alarm function, period settingGPS Return: Direction, distance, speed, GPS return point settingsCompass: Direction display, angle display, magnetic declination settingProduct Features: 1. GPS Beidou dual system compatibility, dual star locating function, speed, distance, 9 sets of return and return records2. Height gain and loss, 7x24 hours of historical height data and curve recording3. Height change interval prompt,4. Height target reminder setting5. Historical height data analysis, temperature and humidity records.6. 24 Hour Pressure Trend Curve Display7. 16 Directional electronic compass function8. Temperature, humidity, time, date, alarm clock, flashlight function9. IPX4 waterproof grade Package List: 1 x Altimeter1 x Charging CableNote1. Please read the manual carefully before use.2. Before climbing, please set up the machine according to the user manual and test if there is any damage to the machine.