All i can say is WOW this thing is so good. Went hunting in some gravel by the rail road tracks you never know were it is shipped in from. Ran sens set at 75 Dic set at 36. Sometimes i would run the coil over my boot eye holes to make sure it was working so quite. Ever time it sounded of over a rusty spike it read ever time 40. All other iron would give a low tone, i found some of the spikes at 5 to 8 In's. I did find a piece of white Q with a couple specks of gold in it about 6 specks it gave a good 43 down about 4 in. under the top layer of gravel. What i like about the Pro is I'm in Ohio and their is alot of metal in the side creeks here. But also a lot of fine gold. and some pickers here and their. I'm in the part were gold has been found. A gold machine without a good dic would be hard to work with here. I had a whites gold master 11 big difference's great out west but not around here. I am very pleased so far with this Gold Bug going back out weds hope to fine some more good stuff. From what i have seen it could well been a $700 Gold detector thank you Fisher. was running with the stock 5in coil.