For starters,,,if your model description is correct,,,,this particular model was and can still be upgraded by White's to a V3i model.
Reports originally were V3 model suffered more so form EMI,,hence the upgrade.
There are menu changes that were incorporated along with the upgrade.
Some folks do run the V3 detector and haven't elected to upgrade.
Myself,,,I have not had V3,, did have V3i.
I sold mine.
Very finicky detector to use IMO,,to get the most out of.
Does have programs already loaded so you can turn on and hunt.
Screen is very nice,,,unit does use substantial battery power.
If you happen to get wireless headphones (they came with them) they too use what seems like a lot of power.
Many,,many settings,,,and some the settings are more for just screen layout, etc,,not performance.
Will take some time for you to get your arms around.
A good operators manual was never really done by the manufacturer IMO.
Some of the folks that did get and try to use,,,,did through trial and error finally discover a lot of things that would work,,,and make it perform.
Not a lot of current/recent posts on detecting forums about either the V3 or V3i.
But I am sure some folks will respond.
Not to drive you away from this forum,,,but IMO the findmall detecting forum had the most and best info concerning operation through settings changes.
I wish you luck with your new detector.
Will take a lot of patience to get very proficient with it.
Key settings,,,not to high on RX gain,,6-9 will do a lot of times.
Recovery delay-- driven by coil size,,stock coil try 60-75
Ground balance -- needs to be proper,,,consider balancing and locking tracking ground balance.
Using 3 freqs will not be as deep as single freq.
Tx boost,,,stay away from it until you are somewhat proficient,,a battery hog,,best used with high EMI,,,meaning when you are stuck using lower RX gain,,hence txt boost will get back some of your lost depth.
Swing speed,,,to detect targets,,,detector settings will drive your swing speed.
Cheers.