Feature: 1. The device is ideal and simple for outdoor enthusiasts. 2. For outdoor sports enthusiasts to provide a wide range of necessary and accurate information such as: electronic altimeter (weather forecast + altimeter + compass + barometer + clock + level + calendar) blue backlight. 3. Application for mountaineering, camping, mountaineering and other outdoor places. 4. Power by 2 x AAA batteries (not including). Long lasting time. 5. Suitable for a variety of outdoor activities. Specification: Condition: 100% Brand New Item Type: Altitude Gauge Material: ABS Color: as picture shown Altitude Gauge: measuring range from -700m to 9000m (-2300 to 2950ft) (altimeter can be initially calibrated) resolution 1 meter or 3 feet Barometer: measuring range from 300mbar to 1100mbar resolution 0.1mbar. Electronic compass: 8- display in azimuth mode external magnetic field correction accuracy ±3 ° resolution 1 degree Thermometer: measuring range -10℃ ~ +60℃ (units of ℃ and ℉ are optional) 0.1 degree resolution Weather forecast and time: forecast weather conditions 12 to 24 hours in advance 4 weather conditions: sunny, semi-sunny, cloudy, rainy 24 hour time format Electronic backlight: 5 seconds high brightness blue LED electronic backlight Battery: 2 x AAA batteries (not including) Size: approx. 9x5x2cm/3.5x2x0.8inch Package List: 1 x Altitude Gauge (Battery Not Included)1 x Hanging Strap1 x Manual