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