FAKE GPX 4500

Oh dear me!
http://www.metaldetectorchina.com/ArticleShow.asp?ArticleID=856

Thanks King Fisher but I.m still in the dark. How do I tune the knobs in the All Metal Mode? How do I know that I have hit a target? How do I know false targets? What other thing do I have to know in making effective use of the gadgets?
My undying gratitude.

Best way to set it would be in several pieces in the Recycle Bin.

Adrian, which of the Recycle bins? Please assist in getting me out of the dark.

The big green one with the yellow lid and wheels. Set it in there and you will see the light.
And that light shall shineth on a sign in thy mind that doth readeth "Buy Awstrayan made GPX4500 mate" such that thow shall findeth buckets of goldeth mate. ( if you do your research, have plenty of patience and dun get lost in the desert etc,etc)