All U.S., Canadian and International marine channel availability. Selectable 1 or 5-watt RF output power. Triple Watch monitors instant channels 16, 9 and 1 pre-selected channel all at once. 10 NOAA weather channels with alerts, Backlit LCD display and keypad. Product Dimensions: 7.8 x 6.5 x 3.2 inches ; 8.2 pounds.