My boat came with a humminbird matrix already installed so all I had to do was just pop of the matrix and pop on the 787c2 . When I baught it I ordered it without the transducer because there was already the same one on the boat...You can by the side scan ducer.Mr.hunters...They sell that unit now with the option of the side scan ducer...I dont know, I am happy with what I have. For now I will stay with the standerd ducer..
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