For fresh or salt water. Incredible detail with crisp, sharp images, even in cold deep water. Eye-popping 640x480 pixel resolution. Full VGA, TFT, 256-color no-glare daylight viewable display. Huge 7" diagonal screen. Depth capability to 3,000' and beyond. FasTrack COLORLINE definition. Fluorescent cold cathode backlighting. Instantaneous screen updates and internal back-up memory. Built-in background map with enhanced continental U.S. and Hawaii detail including nav aids. Screen/keypad cover. Sealed & waterproof. 200 kHz: Packed with single frequency 200 kHz Skimmer transducer (3000 watts peak-to-peak) with built-in temp sensor (HS-WSDX). 50/200 kHz: Packed with single frequency 50/200 kHz Skimmer transducer (8000 watts peak-to-peak at 200 kHz) with built-in temp sensor (HS-50/200-DX) and speed sensor (SP-X). 50/200 kHz Combo: Packed with dual-frequency 50/200 kHz Skimmer transducer, (8000 watts peak-to-peak at 50 kHz, 4000 watts peak-to-peak at 200 kHz) with built-in temperature sensor (HS-50/200-DX) and speed sensor (SP-X), LGC-12W GPS module, MMC card, MMC card reader/programmer and MapCreate CD Rom. Full 1-year warranty.