This device is the ideal minimalist tool for outdoor sports enthusiasts. It provides a wealth of essential and relatively accurate information, including: Electronic Altimeter (Weather Forecast + Altimeter + Compass + Barometer + Clock + Level + Perpetual Calendar) with Blue Backlight. 8-in-1 Altitude Chart This device is the ideal minimalist tool for outdoor sports enthusiasts. It provides comprehensive, essential, and relatively accurate information: electronic altimeter (weather forecast + altimeter + with compass + barometer + clock) blue backlight. Size: 90*50*18mm Weight: 48g Features: Altimeter: - Measurement range of 700m ~ 9000m (-2300 ~ 2950ft) (Altimeter can perform initial correction test) · Resolution of 1 meter or 3 feet Barometer: · Measurement range from 300mbar to 1100mbar · 0.1 mbar resolution Electronic Compass: · 8 - Azimuth position display · External magnetic field correction · Accuracy ±3 degrees · Resolution 1 degree Thermometer: · Measurement range -10 ℃ ~ + 60 ℃ (℃ and ℉ units are optional) · 0.1 degree resolution Weather and Hourly Forecast: · 12-24 hour weather forecast · 4 forecast weather conditions: sunny – partly sunny – cloudy – rainy · 24 hour format Electronic Backlight: Electronic LED backlight with 5 seconds of high brightness blue. Battery: Two size seven batteries (batteries not included) With a customer-first concept, we provide 24/7 customer service. No matter where you are or what problems you encounter, we will solve them for you as soon as possible to ensure your shopping experience is worry-free.