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.<br> Such as: electronic altimeter (weather forecast + altitude meter + compass + barometer + clock) blue backlight.<br> Specification:<br> Size: 90x50x20mm<br> Weight: 60g<br> Material: ABS<br> Color: Silver Grey<br> Package Include:<br> 1 x 8 in 1 Digital Altimeter<br> 1 x Battery<br> 1 x English Instructions<br> Feature:<br> Altimeter: Measurement range -700 to 9000m / -2300 to 29500ft (Altitude meter can be used for initial calibration). Resolution 1 meter or 3 feet<br> Barometer: Measurement range 300mbar to 1100mbar. Resolution 0.1 mbar<br> Electronic compass: 8-azimuth mode display. External magnetic field correction. Accuracy ±3 degrees. Resolution: 1 degree<br> Thermometer: Measuring range -10°C to +60°C (°C and °F units are optional). Resolution: 0.1 degree<br> Weather forecast and time: Forecast weather conditions after 12 to 24 hours. Weather conditions indicate: sunny - partly sunny - cloudy - rainy. 24-hour time format<br> Electronic backlight: 5 Seconds high brightness blue LED electronic backlight<br> Electricity: Use AAA-7 battery 2<br> Precautions:<br> -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<br> -Avoid contact with perfume, alcohol, cleaning agents and other corrosive substances<br> -Avoid near buildings such as concrete/steel or placed on the surface of the metal plate<br> <br> Tips:<br> If you have questions about the product, please consult the seller. We will spare no effort to help you.