Checking History we find the following....
1. Whites was ahead of the technology years ago when this 1st happened.
2. 2 Engineers from Whites designed and came up with Target ID (VDI) and presented it to the MAN at white's. He decided since whites was already so far ahead of the competition in technology he did not want to use this at the time and put the info on the shelf to hold. The 2 engineers then resigned their postion at whites due to this and formed a company called Tenetics.
3. They were great at engineering and bad at business. Choosing to purchase another company which just so happens to now be Bounty Hunter not because they wanted bounty hunter they were really bad then but they wanted the bounty hunter merchandise contract that bounty hunter had with Montgomery Wards.
4. Needless to say they had'nt done their homework again since Wards had already decided not to renew the contract and to quit selling metal detectors.
5. Anyway that is how and why their are Tecnetics detectors now resurfacing for another go in the business end of it. This is why it appears to be a White's design or derivative of White's since these engineers used to work for white's.
6. White's detectors do very well at rejecting bottlecaps,screwcaps so I don't know what happened to the Tecnetics detectors in that regard maybe different engineers worked on the screwcap rejection at white's and these guys were'nt as well versed in that circuity...
Any way NOW you know the REST OF THE STORY.....