1This equipment is a simple instrument measuring equipment made for outdoor sports enthusiasts. 2The device is fully functional and can provide information such as altitude, position, air pressure, time, and temperature. 3The device has a wide measurement range and high accuracy, and can provide you with accurate information outdoors. 4The multi-function meter can provide ultra-bright backlight, no matter what the environment, you can clearly see the readings on the LCD display. 5The device is powered by 2 AAA batteries (not included) and has a power?saving function, so you don't have to worry about charging it outdoors. 6The kit is equipped with a rope to make this device more portable in various outdoor sports.Item Type: Multifunction Digital Altimeter_x000D_Altimeter:_x000D_Approx. -700~9000m / -2300~29500ft measurement range (the altimeter can be used for initial calibration)_x000D_Resolution: Approx. 1m / 3.3ft_x000D_Barometer:_x000D_300mbar-1100mbar measuring range_x000D_Resolution: 0.1mbar_x000D_Electronic Compass:_x000D_8-directional mode display_x000D_External magnetic field correction_x000D_Accuracy: 3_x000D_Resolution: 1_x000D_Thermometer:_x000D_Measuring range: -10- 60 ( and unit adjustable)_x000D_Resolution: 0.1_x000D_Weather Forecast and Time:_x000D_Forecast 12 to 24 hours weather conditions_x000D_4 types of weather forecasts: Sunny-partly sunny-cloudy-rainy_x000D_24-hour time format_x000D_Electronic Backlight:_x000D_5 seconds high-brightness blue LED electronic backlight_x000D_Battery: 2 x AAA (not included)_x000D_Accessories: Lanyard, English user manual1 x Multifunction Digital Altimeter 1 x Lanyard 1 x English User Manual 1. Avoid using it under rain, damp, high or low temperature, etc. (working temperature: 0?50; storage temperature ?20?70)._x000D_2. Avoid contact with corrosive substances such as perfume, alcohol, cleaning agent, etc._x000D_3. Avoid using the following areas that may affect the normal direction of the magnetic compass:_x000D_A. Near buildings such as concrete/steel_x000D_B. Very close to the power station_x000D_C. Very close to household appliances (such as computers, TVs, VCDs, fax machines, speakers, etc.)_x000D_D. Very close to a bridge made of large amounts of steel or metal_x000D_E. When the vehicles (cars, trains, airplanes) are moving very close_x000D_F. Close to or placed on the surface of the metal plate