The built-in GPS receiver can be used for DSC calls and displays current position, date and time. All three radios feature the same interface design utilized in Icom's latest marine products. A directional keypad and soft-key assignments promote fast access to various radio functions and menu settings. For increased readability and nighttime operation, the M324 and M324G emit an amber (orange-colored) glow. For a modern yet practical look, the M424G's screen and rubber keys feature a white backlight. Active noise canceling, 10W loud audio, public address and foghorn functions are features exclusive to the M424G model. For second station capability, the M424G can be connected to the newest COMMANDMIC. Like the M424G, this optional remote control microphone features Class D DSC, an intuitive user interface, and a white backlit screen and laser-cut keys.