Had two 705's and loved both until I got to WY, was real excited to try it out in the prospecting mode. Seemd to be ok in a few streams where I found the usual garbage but when I hit a mine tailing pile it crapped out and just contiuned to sound off over the entire pile. got off the pile and it worked fine. Called Minelab from right there on top of the mountain, can't remember if I talked to John or Kevin. Whomever it was offered no help and said he would have the 705 expert get back to me the same day. Never heard a peep from them. Took out my old Gold Demon and it worked fine over the same ground, no gold but lots of lead! So if I had to give an opinion, I would not recomend it for prospecting.