Feature: 1. This equipment is a simple instrument measuring equipment made for outdoor sports enthusiasts. 2. The device is fully functional and can provide information such as altitude, position, air pressure, time, and temperature. 3. The device has a wide measurement range and high accuracy, and can provide you with accurate information outdoors. 4. The multi function meter can provide ultra bright backlight, no matter what the environment, you can clearly see the readings on the LCD display. 5. The 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. 6. The kit is equipped with a rope to make this device more portable in various outdoor sports. Specification: Item Type: Multifunction Digital Altimeter Altimeter: Approx. -700~9000m / -2300~29500ft measurement range (the altimeter can be used for initial calibration) Resolution: Approx. 1m / 3.3ft Barometer: 300mbar-1100mbar measuring range Resolution: 0.1mbar Electronic Compass: 16 directional mode display External magnetic field correction Accuracy: ±3° Resolution: 1° Thermometer: Measuring range: -10℃-+60℃ (℃ and ℉ unit adjustable) Resolution: 0.1℃ Weather Forecast and Time: Forecast 12 to 24 hours weather conditions 4 types of weather forecasts: Sunny-partly sunny-cloudy-rainy 12/24 hour time format Electronic Backlight: 5 seconds high brightness blue LED electronic backlight Battery: 2 x AAA (not included) Accessories: Lanyard, English user manual. Package List: 1 x Multifunction Digital Altimeter1 x Lanyard 1 x English User Manual Note: 1. Avoid using it under rain, damp, high or low temperature, etc. (working temperature: -20℃‑60℃; storage temperature ‑20℃‑60℃).2. Avoid contact with erosion substances such as perfume, alcohol, cleaning agent, etc.3. Avoid using the following areas that may affect the normal direction of the magnetic compass:A. Near buildings such as concrete/steelB. Very close to the power stationC. Very close to household appliances (such as computers, TVs, fax machines, speakers, etc.)D. Very close to a bridge made of large amounts of steel or metalE. When the vehicles (cars, trains, airplanes) are moving very closeF. Close to or placed on the surface of the metal plate