Hello HiiiQ,
Tell to your friend that he can sell his okm 4000 because it is a bad equipment....
One week ago a friend go to visit me with is okm 4000 , he buy it 3 month ago and
we go to our test field.....
The result is very poor this equipment 4000 do not detect a 200 liters tank at 3 meters but pi connected with a mini logger
detect very well (see in my post the photo of the logging)....
and i tell him try this target a 10 liters tank at 1,20 meters depth ....... and nothing it try two times ...making
a good grid and the routine check up ....and you see nothing in the display after the download.....
My friend will return at Kellyco Miami vendors the unit to exchange with a minelab detector or whatever equipment working good
with loosing a good money!!!! sorry
It is my sincere testimony but for the people who did not believe me , buy it , test it and you will see
Alexis.