FM4850 Black Box VHF Radio with GPS, AIS, DSC LoudhailerThe Ultimate 5-In-1 Tool of VHF RadiosThe FM4850 is a marine Black Box VHF radiotelephone with built-in Class D DSC, AIS Receiver, and Simplified Loud Hailer with intercom. Its compact housing enables it to be installed in a variety of craft, even vessels where space is limited, such as center-console boats.The FM4850 handset shares a common appearance with other Furuno equipment, such as NavNet TZtouch2, NavPilot 711C, and the FI70 Instru