Meanhoo 4in1 Digital Altimeter Barometer Compass Thermometer for Outdoor survival Camping Hiking travel Pocket Multifunctional survival tool,can used as Altimeter,Barometer ,Compass,Thermometer. Altimeter measuring range: 0~5000m . Barometer pressure range: 600~1000hpa;Temperature measuring range: -30~50. High accuracy: 20m;Temperature accuracy: 2 Size: 68mm(D)x 85mm(L) 67mm(Compass Length Dial diameter: 60mm Weight: 90g;Package Included: 1 x Multifunctional altimeter barometer 1 x Hook 1 x User manual According to the pressure value of the forecast future weather changes, so you are prepared and a happy outdoor time. Portable size to carry when go out to climing and Adventure outdoor activities.