The modular design of the Ray240 allows the receiver/transmitter to be mounted in an out of the way location, leaving just the waterproof cell phone style handset and loud speaker exposed on the dash. The Ray240 design allows for support of dual station remote handsets and remote speakers. Each handset provides full function VHF and DSC communication plus a convenient intercom feature for communication between stations. The Ray240 allows you to connect an optional hailer horn that transforms the Ray240 into a hailer foghorn combination with programmable auto fog alert.