"Item Package Dimensions L x W x H:5.28 x 2.64 x 1.14 inches Package Weight:0.08 Kilograms Item Dimensions LxWxH:7.7 x 5.2 x 1.7 inches Size:One Size qwert 8-in-1 hand-held electronic altimeter is an ideal and simple device for outdoor enthusiasts which provide a wide range of more accurate information for outdoor enthusiasts. Such as: electronic altimeter (weather forecast + altitude meter + compass + barometer + clock) blue backlight. Specification: Size: 90x50x20mm Weight: 60g Material: ABS Color: Silver Grey Package Include: 1 x 8 in 1 Digital Altimeter 1 x Battery 1 x English Instructions Feature: Altimeter: Measurement range -700 to 9000m / -2300 to 29500ft (Altitude meter can be used for initial calibration). Resolution 1 meter or 3 feet Barometer: Measurement range 300mbar to 1100mbar. Resolution 0.1 mbar Electronic compass: 8-azimuth mode display. External magnetic field correction. Accuracy 3 degrees. Resolution: 1 degree Thermometer: Measuring range -10C to +60C (C and F units are optional). Resolution: 0.1 degree Weather forecast and time: Forecast weather conditions after 12 to 24 hours. Weather conditions indicate: sunny - partly sunny - cloudy - rainy. 24-hour time format Electronic backlight: 5 Seconds high brightness blue LED electronic backlight Electricity: Use AAA-7 battery 2 Precautions: -To avoid the use of rain, moisture, temperature is too high or too low, (working temperature: 0 C -50 C; storage temperature -20 C -70 C -Avoid contact with perfume, alcohol, cleaning agents and other corrosive substances -Avoid near buildings such as concrete/steel or placed on the surface of the metal plate Tips: 8 in 1 Function: Digital altimeter, with digital barometer, digital compass, weather forecast, time, calendar, thermometer, and backlight The digital altimeter is designed for outdoor use, the detachable string makes the digital compass a perfect hand-carry device for various outdoor activates it will give you backlight when you press any button in any time Thermometer: In Degree Celsius / Degree Fahrenheit Format. Clock: In 12 hours or 24 Hours format. Calendar. Backlight Altimeter: -700 to 9000m / -2300 to 29500ft. Weather forecast. History Altitude record: 256pcs records. Compass: show bearing in degrees and cardinal point Package included:1 x 8 In 1 Digital Multifunction LCD Compass Altimeter Barometer Thermometer;7-15 business days delivery date with tracking number"