12-inch Chartplotter/Sonar Combo Is An All-in-One Solution 12-inch colour display with keypad interface and multifunction control knob High-sensitivity internal 10 Hz GPS and GLONASS receiver Built-in support for single channel CHIRP sonar, CHIRP ClearVü and CHIRP SideVü scanning sonar and Panoptix™ (transducers sold separately) Fully network capable for Garmin Marine Network and NMEA 2000® plus NMEA 0183 support Supports optional BlueChart® g2 Vision® HD charts for Auto Guidance and other premium navigation features