You'll never have to change your battery again with Pathfinder's solar technology. The battery is automatically charged by light, either direct from the sun or from light sources inside. And it keeps that charge for the life of the watch. Light enters the watch through the sapphire crystal and dial, and hits a solar cell beneath the dial. Current is created and stored in the battery. The Pathfinder watch will continue to run under normal lighting conditions.
Digital Compass
For peace of mind, just point the Pathfinder to a 12 o'clock position, push the button and you can take readings in one of 16 directions. North, South, East and West are indicated simultaneously. You can even record up to five compass readings including the date and time.
Altimeter
Use the Pathfinder's altimeter to help gauge the time you'll need to reach the summit! The altimeter checks and displays the altitude every two minutes, and stores readings with the temperature every 15 minutes. The graphing function positions you with respect to your target altitude, while alarm alerts you as you approach your mark. You can record up to 40 sets of data with each record displaying the altitude, month, date and time. The measuring range is from -700 to 10,000 meters (-2,300 to 32,800 ft.).
Barometer
Predict changing weather patterns using the Pathfinder's barometer. It takes readings every two hours and stores them automatically. It graphically displays the barometric pressure for the past 26 hours. The display ranges from 260 to 1,100 hPa/mb (7.65 to 32.45 inHg) with changeovers from hPa to inHg.
Thermometer
A built-in thermometer displays and checks the temperature every 5 minutes. The display can be converted from Celsius to Fahrenheit. Temperature ranges are from -10 to 60ºC (14 to 140ºF).