No, we are not talking about a real rock (as you can see.) But this little gadget is as sturdy as any, designed for skiers and mountain goers. Stay informed about the variations in temperature at different altitudes and receive alerts when temperatures fall below -12° C in order to avoid frostbite danger. Not only that, but with a 3-axis compass, chronograph and an inclination sensor with avalanche warnings thrown in the mix, this gadget might just save your life one day.