Here's what other sites are saying:
The Cobra GPS 500 GPS unit features a 18-parallel channel Global Position System that continuously tracks and uses up to 18 satellites to compute and update your approximate position with a quick acquisition time. It stores up to 500 waypoints with names and symbols and allows you to create up to 20 routes with up to 50 points of interest. The compact design is waterproof and includes a backlit LCD screen.
- FogDog Sports