Garmin Etrax 12 Channel GPS

Global positioning system (GPS) receiver continuously tracks and uses up to 12 satellites.
Calculates current and average speed, time of sunrise and sunset, trip distance, and more.
Automatic track log–10 saved tracks let you retraced your path in both directions.
Tough waterproof case; runs for 18 hours on 2 AA batteries.

This is not a regular GPS but a track logger.