all the sensitivity you can ask for! at max half the breakers in the panel are indicated, reduce sensitivity until only one breaker indicates; "Life's Good". was able to get some idea of circuit routing (other outlets & switches supplied) using max sens. The Beep (audio Indication) could be louder; to some this might be objectionable!; you see!' the old Goats hearing is not all that it should be'. The tool will now be relegated to the tool box till next need; saved a lot of aggravation, paid for itself, well worth the price.