1. The equipment is an ideal and simple equipment for outdoor sports enthusiasts.2. It provides extensive and accurate information for outdoor sports enthusiasts, such as electronic altimeter (weather forecast + altitude meter + compass + barometer + clock) with backlight.3. Functions: altimeter, barometer, level meter, weather forecast, compass, thermometer, calendar, time, backlight.4. Scope of application: hiking, camping, mountaineering, and other outdoor places.Specification:Material: ABSBattery: 2 x AAA Battery (not included)Altimeter:Measurement range: -700 m ~ 9000 m (-2300~2950ft) (altimeter can be corrected for initial test)Resolution: 1 meters or 3 feetBarometer:Measurement range: 300mbar to 1100mbarResolution: 0.1mbar.Electronic Compass:8- azimuth mode displayExternal magnetic field correctionAccuracy: 3 DegreeResolution: 1 degreesThermometer:Measurement range: -10~+60( and optional)Resolution: 0.1 degreesWeather forecast and time:Weather forecast after 12 to 24 hours4 weather conditions indicate: clear - half clear - cloudy day - rainy day24 hour formatElectronic backlight: 5 second high brightness blue LED electronic backlightWarm Tips:1. Avoid using in the rain and damp, high or low temperature condition (temperature: 0-50; storage temperature:-20-70).2. Avoid contact with corrosive substances, such as perfume, alcohol, cleaning agent, and so on.3. Avoid being used in a region that may affect the normal direction of the magnetic compass:a: Near concrete / steel and other buildings.b: It's very close to the power station.c: Close to the home appliances (such as computers, TV, VCD, fax machines, loudspeakers, etc.)d: The bridge is very close to a large number of steel or metal.e: It's very close to moving vehicles (cars, trains, planes).f: Near or placed on the surface of a metal plateNote:Please allow 1-3mm differs due to manual measurement.Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding.Included1 x Altimeter1 x Lanyard1 x User Manual