Uniden UM-625C GPS Intuitive Fixed Mount VHF, Dual Zone Loud Hailer Marine Radio 2 x 30 watt loud hailer for independent or dual use NMEA 0183 digital input/output to allow connection of external GPS unit All USA, Canadian, and international marine channel availability Triple Watch monitors instant channels 16 and 9, and one pre-selected channel all at once Class D DSC rated