Serious Communications for serious boaters! Some of the features of the Quantam include: Oversized alphanumeric LCD, Knobs and Keys, Large 2.8 inch internal speaker producing HUGE AUDIO, 30 Watt Loudhailer with listen back and 4 Fog Horns, Bells and Whistles, Removeable Clear Voice Speaker Microphone with 16/9 Key and Channel Selection, Optional VH-310 Telephone Style Handset alows two-way private communication, Display shows channel names and repeats GPS information (with GPS attached), Capable of connecting 2 optional enhaned microphones, DSC position information request function and NMEA data input/output to connect to GPS Plotter, Audio Tone Controller, 80dB Rejection, Versatile user-programmable scanning, Priority Scan and Dual Watch, NOAA Weather Channels and Alert, One-button access to Channel 16 and 9, One button access to selectable preset channels, Access to all USA, Canadian and International Channels. 3 Year Waterproof Warranty! Many more outstanding features. In our opinion, this is one of the finest marine radios made today.