well went to 300 year old farm and got permission to hunt field in back of my house,only detected 300yds which is length of my property in back.First target was very large at 13 inches.Turned out to be the tip of an old iron plow.that had broken off.. Next signal was at 9 inches and turned out to be an old bowie knife blade.Next target was at 8 inches and turned out to be an iron bead off a plow horse collar.also old iron bolt old large musket ball. not bad for 1 hours work! only covered less than 1/100th of farm field. plenty left for quite awhile.I feel so much better from the bust of coin beach!Thanks Wayne And good hunting!!