This new addition to the Pro Trek range is powered by a tough solar power system which eliminates the need for batteries. The analog-digital configuration means you can always check the time even while viewing digital data. A trio of sensors provides up-to-the-minute readouts of barometric pressure and altitude (-700 to 10,000 meters), air temperature, and bearing. All of this and more makes the new PRG-60 a serious adventuring tool thats just the thing for challenging the great outdoors.