"GPS SYSTEM 4.4 X 2.0 X 1.2 INCHESHAVING A 2.1 X 1.1 INCHES SCREEN; WITHIN 2 DEGREE ACCURACY WITH EXCEPTION TOEXTREME NORTHERN AND SOUTHERN LATTITUDES, WITHIN 5 DEGREES; INDEFINITE DATA STORAGE; KEEPS 500 WAYPOINTS W/NAME AND GRAPHIC SYMBOL; USES 2 DOUBLE A BATTERIES; BATTERY LIFE IS 22 HOURS; WATERPROOF; INTERFACES ARE RS232 WITH NEMA 0183, RTCM 104 DGPS DATA"