no problem with the unit, but I have a problem, I have a bad case of write it down and loose it I have a lowrance HD-7 and I would like to know which transduce to use from the drop down list. I at one time had it written down alas now I dont know which one to use, was hoping some one would save me some time and trouble. as stated earlier the HD-7 is being used with a minn kota us-2. thank you for looking