Features: Multifunctional Digital Altimeter: it has the functions of weather forecast + temperature meter + altimeter + compass + barometer + clock + level gauge + 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 (/ units switchable) Electronic Backlight: 5 seconds Power Supply: 2 * 1.5V AAA battery (NOT included) Item Size: 90 * 50 * 20mm / 3.54 * 1.97 * 0.79in Item Weight: 50g / 1.76oz Package Weight: 60g / 2.12oz Package Size: 15 * 8 * 2.2cm / 5.91 * 3.15 * 0.87in Packing List: 1 * Digital Meter 1 * Lanyard Shipping: 1.We guarantee to ship goods out within 24-72 hour after payment confirmation except holiday. 2.We ship by China post,HKpost EMS,DHL,Fedex,according to your choice when placing orders . 3.If you didn't receive the item after 45 days,please feel free to contact us.We will make all our effort to resolve the problem. 5. Due to stock status and time differences, we will choose to ship your item from our first available warehouse for fast delivery. Warranty: 1.All items have 1 year guarantee.IF your purchase do not meet merchantable quality, fitness for purpose or match the description, We can make sure your issues are resolved . 2.For wrongly-shipped items, Please contact us in 48 hours after delivery.We will arrange to deliver the correct items or return all your payment. 3.For defective or faulty products,please take photos or videos,we would resend or refund after confirmation.