The Garmin GPSMAP 420s is a marine GPS chartplotter that is designed to provide accurate navigation and mapping information for boaters and fishermen. It features a high-resolution color display that is easy to read in any lighting conditions, and it comes preloaded with detailed maps of coastal areas, lakes, and rivers. The GPSMAP 420s also includes advanced sonar capabilities, allowing users to view underwater structures and fish populations in real-time. To protect the valuable display of this device, our website offers a range of screen protectors that are specifically designed to fit the GPSMAP 420s and provide superior protection against scratches, smudges, and other types of damage.