The theory of LRL (Long Range Location) operation is to transmit a signal into the ground that will excite the distant buried target. A “signal line” is established between the transmitter and the target, and the dowsing rods are used to detect and track the signal line. Because the receiving half of the VR-800 is just a pair of simple dowsing rods, it stands to reason that the transmitter half somehow justifies the suggested retail price of $1995. Let's start with a look at the transmit box.
“Geotech— LRLs—Reports—VR-800 [1]”
I forgot to link to this page [2] detailing the inner workings of some questionable devices I mentioned on Saturday [3]. I got so sidetracked on the audiophile scams that I totally neglected the whole long range location devices.
What's neat about that site is it goes into quite a bit of detail of just how shady these things are, and how they work (or rather, don't).
It's just amazing that people fall for this type of stuff.
[1] http://geotech.thunting.com/cgi-