High-brightness 4″ (10.2cm) diagonal Film SuperTwist LCD Highly visible 240V x 160H pixel resolution Amber LED backlit screen and keypad for night or low-light viewing Transmits NMEA 0183 data Complies with Digital Selective Calling (DSC) requirements for transmitting position, time, and date to DSC equipped VHF marine radios Simplified keypad with Menu and Pages keys Overlay Data feature displays GPS information over sonar screen, and sonar information over GPS screens Space-saving case design with adjustable tilt, quick-mount/release convenience