The Garmin GHC 20 Marine Autopilot Helm Controller is compatible with newer Garmin autopilots as well as legacy models on both power and sail vessels. The Garmin GHC 20 Day & Night Marine Autopilot Controller has a large, bright 4" color display is easy to read at a distance and 170 degree viewing angle. Glass-bonded anti-glare lens prevents fogging and increases contrast. Daylight readability is enhanced with a high contrast color scheme. For enhanced night visibility, you have a choice of red/black, green/black or the normal night mode color scheme along with a dimmer control. An optional handheld wireless remote control is available; however, for the highest level of convenience, control the Garmin GHC 20 Marine Autopilot Controller using quatix, the world's first marine GPS navigation watch featuring ANT wireless technology. Power is supplied by the NMEA 2000 network. Included are 2 trim snap piece cover options which allow you to match the Garmin GHC 20 Marine Autopilot Controller w/ 4" Color Display with the new GPSMAP 500/700 series, GPSMAP 8000 Glass Helm series or legacy Garmin chartplotters.