Totally waterproof to strict JIS 7 standards and it floats. Built-in GPS receiver with unique new trackplotter screen feature. Great Circle waypoint navigation. Storage of up to 500 waypoints. Man Over Board functionality. "Track-Your-Buddy" feature allows boaters to pinpoint and display the exact location of other vessels using LL position polling. "Get Buddy" feature transmits the radio's position by a simple push of a button. Save a buddy list of up to 20 people. Large 128 x 128 pixel LCD with adjustable contrast settings and backlighting. 7.4V 1400mAh Li-Ion battery pack. Receive Signal Strength Indicator (RSSI) displays strength of incoming/outgoing signals. NOAA Wx 1050Hz tone alert for weather/storm warnings. Selectable 5W/1W transmit power. Latitude, longitude and time display. Distress call button with hinged door. Program up to three favorite channels on a dedicated key. RX/TX signal strength meter. Memory indicator plus 4-bar battery life gauge. Rubber Duck antenna. Desktop charger with wall adapter. Wrist strap and belt clip. All USA, Canadian and International channels. Power Saver Circuitry automatically switches to battery saver after 10-second TX lapse. Extended battery life: 10 hours (5 w on 5-5-90% ratio), 13 hours (1 w on 5-5-90 ratio). 2-year warranty. ****Enhanced with a built-in GPS receiver, the Lowrance LHR-80 is a full-featured, free-floating, handheld VHF marine radio with the added convenience of a simple plotter with Great Circle waypoint navigation, Man Over Board functionality and storage for up to 500 waypoints.