I have covered 300ft x100ft and finally a nice big slug came , thru with a big loud signal ,it was very shallow for the bliss only 8" deep and not far away a shell casing . Had a great time , bugs not to badd, just waiting for a silver to come out .--------------- and dont figure I did not bring the video cam , because i figured i would find nothing , the shell casing made a dubble beep but not like Iron it was a clean dubble beep , if its not Iron the bliss lets you know , finnaly I have the right tool for the job