Start your adventurous trip with this BKT381 Altimeter-barometer with Compass and Thermometer. It includes a built-in digital compass, altimeter, barometer, and thermometer. This device features large function buttons that are easily accessible even when wearing gloves. Both the case and strap are made from durable material. The altimeter provides a target altitude alarm and graphing capability for target and altitude tendency. Timekeeping functions include a daily alarm, optional hourly time signal, and 12/24-hour formats. Other features include a comfortable strap and lightweight size, this functional altimeter-barometer will bring you much convenience.                                    Features            A multifunctional device widely used It is a compass, altimeter, barometer, and thermometerLightweight size and portable to carryProvide a target altitude alarm and graphing capability for target and altitude tendencyTell you the time, temperature and directions at anytime you need                                                            Specifications             1. Measuring Range     0-5000m(0-196850)"/ 580-1040Pa/-30℃~50℃(BKT381)0-5000m(0-196850)"/580-1040Pa/(B381)2. Resolution:787.4" / 20m3. Measuring Temperature: -30℃~50℃    <br>
 Reference Temperature     22℃(±2℃)    <br>
 Operating Temperature     -30℃~65℃/-4℉~140℉    <br>
Storage Conditons     -30℃~65℃, &lt;90% RH    <br>
Dial Size     2.36" / 6cm    <br>
Weight     6.7oz / 190 g      <br>
                                                             Package Includes            1 x Altimeter-barometer<br>
1 x Compass<br>
1 x Thermomter<br>
1 x User Manual<br>