Garmin 010-00766-00 GPSMap 441 Marine GPS Receiver: * Ultra-bright 4" diagonal QVGA display * 240 x 320 pixels, more than 800 nits of brightness * NMEA 2000 certified * The Garmin Marine GPS is preloaded worldwide marine basemap * Compatible with GXM 51 for XM satellite radio and XM WX satellite weather * Built-in high-sensitivity GPS receiver * High-speed processor for fast screen redraws and smooth panning * Streamlined user interface makes it simple to select modes and features * Single secure digital card slot for BlueChart g2 vision cards and saving waypoints, routes and tracks to a secure digital card * Adding optional BlueChart g2 vision cards provide enhanced navigation features like auto guidance, satellite imagery, 3D mariner"s eye view and 3D fish eye view * Backlit keypad for easy operation in low light conditions