Yep those are for Lowrance BUT you have to buy a $230 piece of equipment to make it work. It should be installed in the unit and it should NOT be that much.
That would mean my IPhone bluetooth capability costs half the phone?!?! I don't think so.
Like I said they want your money instead of putting it in the unit very easily.

C'Mon Humminbird, let's see some BLUETOOTH!!!!!!!!!