OK. After taking a closer look on the links JPlayer provided and re-reading the Knouzm laserscan manual I came with the impression that they indeed modified the laserscans to find treasure.
1 - They redesigned the LCD screen which features 2 modes. RANGE and GOLD. First the user turn the device on and set in RANGE. This allows collecting the temperature in four directions in the ground. Then he changes to GOLD and start searching. When there's a 10 degree + change, the target is located which I suspect as I said earlier, they collected the data for gold temp location.
2 - And this second evidence may corroborate my thought of the unit being modified. This is in the manual:
NOTICE:
I- This device has been manufactured for many purposes. Regarding the
treasure haunter, two sensors were added to the device to work more
professionally in the difficulty soil and earth conditions.
So as can be seen, despite the fact that this is in fact an OAKTON unit, even if it's already discontinued, it probably was modified.
JPlayer, my invitation for you to test a regular OAKTON and compare results with my possible test is still up.
I inspected closely all the pictures of the oakton models and cocluded that the knouzm unit is not any of them altough the colors and shapes look similar. For instance, the knouzm unit has only 3 pushbuttons plus mode , the oakton 9 beam has 5 pushbuttons plus mode. The LDC in the knouzm is quite bigger than the oakton's.