I saw 2 videos on http:// coinrelicdownunder.wordpress/2011/10/20etrac and found it to be very interesting.Instead of using TTF and hearing a high tone on every piece of trash, using the relic screen in conductive multi tone you could hear all the trash targets which you just ignore and then you hear the High tone of silver and zero in on it with pinpoint. I would like for some of you to check out these videos especially G4Ever and Nebtrac and give me your opinion of what you think of the advantage is. mono 2 tone vs multi tone Long