you swing an explorer or E-Trac.
It is an invaluable tool when you are in iron infested sites!...AND what the probe sees...YOU see on the screen whether it be cursor flutter/placement or "flashing numbers"
After I get a plug out on an iffy/iron type hit...I then run the probe in the normal detector mode.
If the probe nulls...I walk. If it sings though I will then put it in the pinpoint mode to get the added benefit of all metal ID as well as hone perfectly in on exactly where the target is. I have saved myself from scratching many good silver coins over the years utilizing the X-1.
IMHO the X-1 inline probe is the best invention for metal detecting since the detector itself.
It saves hours of hunt time from chasing deep iron and nails. You can tell instantly whether it's a target worth "chasing" or iron/nails because the probe will null in conductive sounds/iron mask if it's iron.
I also have the Garrett propointer which is a good one...and always keep it with me as a backup just in case my sunray probe would crap out on me.
It is still sitting new in the box in my accessories bag I take with me.
The only possible downside I can see about the Sunray is the fact that's its twice the cost of the next best thing in my opinion which is the Garrett propointer.
The UPSIDE to that just stated "downside"....it's WORTH EVERY PENNY!
I would not hunt without it on my Explorer....period.