Topic: ICE 55

[Trytoofish]

I recently purchased a ICE 55. I have owned a Vexilar  for years,Man is this thing cool,I sure like the center lcd display and the 6 color setting makes an absolute difference between just your bait and a fish near your bait. 
Does any one know what the third connection jack is for on the rear,there is a transducer,power and unused/unknown!

[Humminbird_Greg]

That connection is used for in factory testing Trytoofish.
Never been ice fishing and have not used any of the Ice Flashers on the water (frozen or otherwise) so let us know how it works for you.