This full-featured, premium fixed-mount VHF radio includes all of the bells and whistles (literally) that a mariner might need.The Quantum GX5500S is a commercial-grade VHF with a comprehensive assortment or premium functions. With an optional BTK-2 Bluetooth headset (sold separately), you can talk or listen from anywhere onboard.A large alphanumeric keypad lets you easily enter MMSI numbers, and the oversized full dot-matrix display is versatile and easy to read. Plus, the Quantum GX5500S includes a 30 watt PA system, complete with preprogrammed foghorn with listen back, bell and whistle signals. Add a second station with an optional RAM3 mic, or listen to clear transmissions with the ClearVoice noise-canceling speaker mic.Key Features30 Watt PA/Loud Hailer with preprogrammed fog signals, bells, whistles and listen backBass and Treble tone control: This unique feature allows the treble and bass of the speaker audio to be adjusted for best listening; The effect is similar to adjusting the treble and bass controls on a stereoIUT-R M493-12 VHF with commercial grade 80dB receiver; Advanced receiver technology rejects the reception of unwanted signals from pagers and other unwanted VHF frequenciesRadio operation and channel selection is made easy (even with gloves) with the oversized volume, squelch and channel selector knobsFull dot matrix LCD displaySubmersible JIS-7 / IPX7 (3.3 feet for 30 minutes)Independent Channel 70 receiver built-in for continuous DSC watchLAT/LON, SOG and COG shown on display when connected to GPSRemovable ClearVoice noise canceling speaker mic with channel selection and 16/9 keyFront panel speaker microphone can be relocated to rear panel using optional MEK-4One-button access to Channel 16 and 9Large rotary knobs, and oversized displayCapable of connecting to RAM3+ second station optional Remote Access MicIntercom between radio and second station microphoneWhat's in the BoxGX5500SHand microphonePower cord with fuse holderMounting bracket and hardwareOwner's ManualDSC Warning sticker