For Yamaha Helm Master Systems With Complete Package Designed For Powerboats And Sailboats; Steer-By-Wire Type; CCU 3-19/32 Inch Diameter; Buzzer/Alarm 29/32 Inch Length x 1 Inch Diameter; NEMA 2000 Power Input 9 To 16 Volt; With GHC 20 Helm Control Display, Reactor 40 CCU (Course Computer Unit), Yamaha Gateway, CCU Cable 9.5 Feet Length, Buzzer, 2 Meters NMEA 2000® Drop Cables, NMEA 2000 Power Cable, NMEA 2000 T-Connectors, Male/ Female Terminators