The Uniden UM455VHF has a watertight housing certified to global standard JIS7 and is the flagship of all VHF marine models. The rugged waterproof and submersible speaker microphone is designed for operating on the water and has dual speakers for better sound clarity. With the large LCD back-lit display it makes viewing easy in low light situations and the non-slip rubberised microphone and controls keep it easy to control. Boost the transmission from 1 to 25 watts giving you maximum transmission distance. The DSC Class D function allows for selective calls to any vessel with a DSC marine radio. Send or display position information with the connection of an optional GPS receiver or optional chart plotter. Send an Emergency Distress signal at the touch of the Red Emergency button; this includes your MMSI number and GPS position.