Just thought I would share what I figured out on my Pro Pointer.
A ring on the index finger of the hand you use to hold the Pro Pointer will work just like sliding a coin to adjust the sensitivity (extend the range).
Just make sure the ring that is on your finger is behind the push button when starting.
After you turn it on just reposition your grip a bit by moving your hand forward to get the chirping started then back off a bit until it stops chirping. Tighten grip and let it rip.
Your set to go.
It doubled my range. I can consistently get almost 4 inches on a nickel. That's really the only coin I tried.
I figure that if it's that good with a nickel then the others will work.
BTW, I always wear a wedding band and it happens to fit my index finger so it is a quick fix.
Just don't use the hand that you use the Pro Pointer with to scan a clump of dirt across the detector search coil.
Mike