The Humminbird Fishfinder Sonar Head Unit includes the model 535, 581, and 596 fishfinders, each with a depth indicator and sonar sensors for accurate underwater navigation. This unit is designed for outdoor use, with a black plastic construction that is lightweight at 1 lb. Made by the reputable brand Humminbird in the United States, this electric-corded head unit is a must-have for fishing enthusiasts looking to enhance their fishing experience with precise depth readings and reliable sonar technology. The last time used worked but can not guarantee
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