Garmin Grid 20 HorizontalProvides intuitive, easy to use remote access and control of your entire Garmin marine system. 360 degree, all in one joystick with a rotary knob and push to select button. Enables easy chart plotter menu setting navigation and fine control, even in the worst conditions. 4 favorite keys can be designated to restore your system to a previously saved configuration. Allows wired or wireless installation options.