8-in-1 Handheld Electronic Altimeter Compass Pressure Gauge Elevation Meter Thermometer Outdoor Fishing Barometer Meter This device is ideal for outdoor sports enthusiasts. For outdoor enthusiasts, a wide range of necessary and accurate information such as electronic altimeter (weather forecast + altitude meter + with compass + barometer + clock) blue backlight. Size: 92*51*22mm/3.62*2.01*0.87inWeight: 81g Features: Altimeter: Measurement range from -700 meters to 9000 meters (-2300~2950ft) (the altimeter can be used for initial calibration) Resolution 1 meter or 3 feet Resolution 0.1 mbar. Electronic compass: 8-azimuth mode display External magnetic field correction Accuracy 3 degrees Resolution 1 degree thermometer: Measurement range -10C+60C (optional in C and F units) 0.1 degree resolution Weather forecast and time: Forecast weather conditions after 12 to 24 hours 4 weather conditions indicate: sunny semi-clear cloudy rainy 24 hour time format Electronic backlight: 5 second high brightness blue LED electronic backlight Product use Description of operation steps: (For detailed operation, please refer to the attached manual) Matters needing attention: 1, to avoid the use of rain, moisture, temperature is too high or too low, etc. (operating temperature: 0 C -50 C; storage temperature -20 C -70 C); 2, to avoid contact with corrosive substances such as perfume, alcohol, cleaning agents; 3. Avoid using the area that may affect the normal direction of the magnetic compass: A. Near buildings such as concrete/steel B, very close to the power station C. Close to household appliances (such as computers, TVs, VCDs, fax machines, speakers, etc.) D, very close to the bridge made of a lot of steel or metal E, very close to the means of transportation (car, train, plane) F, close to or placed on the surface of the metal plate Package:1PCThe battery does not include _x000D_