Not really. He retunes the high tone ranges to be where they are in the CZ3D "enhance mode" so it puts more old US coins in the high tone range and not mid-tone. For example, in normal tune many indian head pennies will ring mid-tone while in the "enhance mode" they ring high tone. There is no addition of a 4th tone that the CZ3D has, the CZ5 remains a three tone detector, just with the high tone range a little different than stock tune.He can also convert a CZ-5 to a CZ-3 specs if you are interested.