The Humminbird 778c HD Fishfinder features a brilliant color 640V x 640H 5-Inch display and dual beam 83/200 KHz sonar with 500 Watts of transmit power. Rugged construction and ease of use make Humminbird fishfinders a favorite of anglers worldwide. The unit has Advanced Fishing System capabilities, which include optional WeatherSense Barometer, Wireless Sonar Link, Cannon Link downrigger control, and Interlink for multiple unit use. It also has three programmable preset buttons to recall your favorite views. The unit features a Real Time Sonar window, selective Fish ID, echo enhancement, and split screen zoom. The user-friendly technology includes custom digital readouts, large digit view, quick disconnect mounting, triplog, and X-press menu system. Included in the package is a transom mount transducer, installation hardware, and owner-Feets manual. Dimensions: 6.9-Inch W x 7.5-Inch H x 4.5-Inch D. One year parts and labor warranty.