Features:
1. Altitude total gain/loss, 24 hours altitude record and trend chart
2. Max/Min altitude, temperature, humidity record
3. 24 hours air pressure trend chart
4. Incorporate altimeter, barometer, compass, thermometer and hygrometer functions etc.
5. Time, date, alarm clock functions
6. Built-in rechargeable battery
7. IPX4 waterproof

Specifications:
1. Altimeter:
1) Display range: -2296ft to 29500ft/-700m to 9000m
2) Resolution: 1m/3ft
3) Altimeter measurement: Sea level altitude/Climbing altitude
4) The highest altitude record automatically during climbing: Available
5) Altitude gain/loss calculation: Yes
6) History altitude record: Record altitude every 30 minute
7) Unit: M and Ft unit switch available
2. Barometer:
1) Display range: 300hpa to 1100hpa/8.8 to 32.6inHg
2) Resolution: 0.1hpa
3) Unit: Millibar and InHg unit switch available
3. Thermometer:
1) Display range: -20oC to 60oC /-4oF to 140oF
2) Resolution: 1oC/1oF
3) Unit: Celsius and Fahrenheit unit switch available
4) History temperature record: Max/min temperature record
4. Hygrometer:
1) Display range: 20% ~ 95%
2) History humidity record: Max/min humidity record
5. Compass:
1) Display mode: 360o with eight directions
2) Resolution: 1°
6. Weather forecast:
1) Forecast for future 12 to 24 hours weather
2) Four weather status: Sunny-Slight sunny-Cloudy-Rain
3) Time & Date: Display mode 24H or 12H available
7. LED torch: High-light LED torch
8. Backlight: 5 seconds high-light LED backlight
9. Waterproof: IPX4