Uniden's advanced marine engineering has produced a radio that hears what it's supposed to and filters out all the rest. Class D commercial rated,these smart,rugged designs offer innovations you won't find on any other radio, like the largest displays with easy to read character icons, high powered hailer/intercom receivers,NOAA weather and all USA,International and Canadian marine channels. The UM525 is loaded with great features, including all US, International, and Canadian channels,programmable scan, triple watch, step key, selectable Hi/Lo transmit power and more. It also has NMEA 0183 digital input and output, allowing the connection of an external GPS and the ability to output DSC call information to a chart plotter to establish call origin. A huge 3" diagonal display with large characters/icons provides for easy readability from any angle without reading glasses. Plus, with the bright orange backlight on the LCD, radio and microphone keys, you'll never be left in the dark.