Features: Multifunctional Digital Altimeter: it has the functions of weather forecast and temperature meter and altimeter and compass and barometer and clock and level gauge and calendar. High Accuracy Altitude Meter: the principle is to measure the height difference by the sensor sensing the change of atmospheric pressure. Clearly LCD Display with Electronic Backlight: with 5 seconds high brightness blue backlight. Weather Forecast and Time Function: forecast the weather conditions in 12 to 24 hours, 24-hour time format. With 4 Kinds of Weather Conditions: sunny, semi sunny, cloudy, rainy. Easy to Use: a simple equipment to provide necessary and accurate information for outdoor enthusiasts. Specifications: Material: ABS Altitude Measurement Range: -700-9000m (-2300-2950ft ) Resolution: 1m Barometer Measurement Range: 300-1100mbar Resolution: 0.1mbar Electronic Compass: 8-azimuth mode display, external magnetic field correction, accuracy: 3 degrees, resolution: 1 degree Temperature Measurement Range: -10-60 celsius ( celsius / Fahrenheit units switchable ) Electronic Backlight: 5 seconds Power Supply: 2 x 1.5V AAA battery (NOT included ) Item Size: 90 x 50 x 20mm / 3.54 x 1.97 x 0.79in Item Weight: 50g / 1.76oz Package Weight: 60g / 2.12oz Package Size: 15 x 8 x 2.2cm / 5.91 x 3.15 x 0.87in Packing List: 1 x Digital Meter 1 x Lanyard Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.