Huge GPS and fishfinding performance in a small case and in color!Even though your boat may not have a lot of space, you can still get huge performance in a small size with Humminbird's 300 Series fishfinder/GPS combos. The 383C is loaded with advanced fishfinding technology such as Real Time sonar for rapid updates and Sonar Echo Enhancement for the highest degree of sensitivity. It has all the advanced fishfinding performance of the bigger models including advanced DualBeam PLUS sonar and the built-in UniMap covering U.S. coastal waterways and inland lakes and rivers to 4nm, and it includes a precise 16 channel GPS/WAAsS receiver with omni-directional antenna for higher performance. Brilliant high-res, 256-color 3.5" diag. display is daylight viewable. Water temp, GPS speed and in-hull/transom mount transducer included. Brilliant color, 320V x 240H high resolution 3.5" TFT display Built-in 4 nautical mile resolution UniMap of USA inland lakes, rivers and coastal areas Includes an internal precision 16-channel WAAS/GPS sensor Maximum Depth: 1000' Transmit Power: 2400W peak to peak/300W RMS Transducer: In-Hull/Transom Mount included with 20' cable In-Dash Dimensions: 5.25"W x 5.12"H x 3.4"D Interface Inputs/Outputs: NMEA Waterproof: Mfr. rated waterproof Warranty: One year