Well being testing the Mars 7 inch lion dd on my v3i. Excellent construction very sensitive Coil cable has to be straight up the stem to the handle and then the excess wound around before connecting to the control box. I can run it to the limits even using boost no overload very deep for its size pinpointing is ok, Excellent on fine gold chains using my gold bling special program. Just love the v3i had it for 11 years and once you know how to handle its combinations of settings to its best advantage you have an absolute dream of a detector to use. Best detector i have ever used in 43 years of detecting in Australia.