You'll always be able to read your PRO TREK display... even in total darkness. Two high intensity light emitting diodes (LED's) make the face of the PRO TREK exceptionally bright. The watch also includes an auto light. So when you tilt the Pathfinder toward your face, the LEDs automatically light up for night time viewing.
Auto light is disabled when any of the following conditions exist;
• While an alarm is sounding.
• While a bearing sensor calibration operation is being performed in the digital compass mode.
• Receive operation is in progress.