Barometer Altimeter Thermometer Weather Forecast Monitor for Climbing Camping Outdoor Sports, Multi-Function with Backlight

Product description
Material: ABS
Historical altitude record: 256pcs record
Thermometer: Celsius/Degree Fahrenheit format
Clock: 12-hour or 24-hour format
Calendar, backlight
Power saving design: Start automatic altitude measurement
Power:1x3V CR2032 Battery (Battery Included)
Product details
Package Dimensions ‏ : ‎ 5.98 x 4.61 x 1.34 inches; 2.12 Ounces

Barometer & Altimeter: The air pressure value on the screen is the air pressure at the current location. The height value on the screen is the sea level of the current location. Press [ALTI/+] button to switch the use of altimeter and barometer.
Relative Altitude: Monitor the ascending or descending altitude from one certain location or the relative altitude for any mountain or object etc.
Weather Forecast: Apart from detecting the altitude, barometer also helps to forecast the weather for the forthcoming 12 to 24 hours basing on barometric pressure changes. The effective range is 30-50kms.
History Altitude Record: Press [HISTORY] button, you can view records of history altitude and air pressure. It will display the most previous record in this mode, then you can press [ALTI/+] or [-] button to forwards or backwards view history records.
It can save most 256pcs records, the records’ distance are five minutes, and you can change the distance from 1-60 minutes if you press and hold [HISTORY] button for 2 seconds.
Save power design: When you don’t want to use the device, you press and hold [SET] button for 5 seconds, the device will stop all display enter into dormancy mode. And then you press any button, it will resume previous display.
Backlight: In any mode, it can give you backlight for 5 seconds that you press any button.