Description: 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: ABS Battery: 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 feet Barometer: Measurement range: 300mbar to 1100mbar Resolution: 0.1mbar. Electronic Compass: 8- azimuth mode display External magnetic field correction Accuracy: 3 Degree Resolution: 1 degrees Thermometer: Measurement range: -10~+60( and optional) Resolution: 0.1 degrees Weather forecast and time: Weather forecast after 12 to 24 hours 4 weather conditions indicate: clear - half clear - cloudy day - rainy day 24 hour format Electronic backlight: 5 second high brightness blue LED electronic backlight Warm 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 plate Note: 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. Included 1 x Altimeter 1 x Lanyard 1 x User Manual