Depending on where im detecting and the time i have alloted detecting that day i go anywhere between the coin range and ring range, if im out for the day i do a little experimenting. I earn more about it every time i use it. definately study the manual, as it will help alot. As far as picking up tree roots, my buddy and i were out searching one day, and he found a nail grown into a tree root. If you have a pinpointer, find the spot on the root, and get to the bottom ogf the signal!