Moving down the line in the Prizm series from teh Prizm V is the Whites Prizm IV. The the White's site, some of the top features on the Prizm IV: "Smart Notch. You choose ... detect or ignore them. Tone I.D. 3 distinctly different audio tones instantly cue you to the target's desirability. LOW signals nails and iron. MEDIUM is rings and jewelry. HIGH indicates coins. Depth Reading as you hunt. Once you've detected a good target, the screen shows you how deep to dig."

Lost Treasure magazine didn't review all of the Prizm Detectors, yet, but the do have this review and field test of the Prizm IV. They call he Prizm IV light weight and operation of the metal detecor as a "no brainer" then move onto a rather brief field test. The review also mentions the Prizm IV comes with an instructional video and ends with "If you are in the market for a mid-priced, feature-filled and easy to use detector, make sure you take a look at White's Prizm IV. It could well be the only detector that you will ever need, or ever want!"