Lowrance LCX-28C HD 7-Inch Waterproof Marine GPS and Chartplotter (200 kHz Transducer) Features a rugged, built-in, shock-resistant 30 GB hard drive, preloaded with a wealth of electronic maps and charts for coastal and inland navigation in and around the United States and Hawaii Advanced sonar receiver technology reduces interference and enhances sensitivity and picture quality; single frequency transducer provides 3,000 watts peak to peak for 200 kHz Offers an easy-to-read, seven-inch, diagonal, 480 x 640 TFT color display with cold cathode backlighting Comes with a one-year warranty Easy-to-use system combines champion-grade sensor with GPS receiver