K - Air test your ProPointer on a target (dime) and note the depth/distance. Turn off - your done there.
Okay, take a coin (I usually use a penny - in case I loose it out in the field).
Turn on the ProPointer.
Hold the coin (penny) against the ProPointer (I use my thumb) by the battery compartment area - me, against the side usually below the switch.
Slide the coin (against the ProPointer) going toward the tip, slowly, until it just makes a pulse/beep. Mine usually ends up doing this when the coin is just about to the LED light. So I guess you can say between the on/off button switch & LED light. Now back the coin off just slightly till the pulse/beep just stops.
Now while that coin (penny) is held still against the ProPointer, test the distance you get with the tip of the ProPointer to a target (same dime you did at the start), and note the depth/distance.
Any difference?