Well I am still learning the machine, I have about 25 hours logged on it and I was hunting one of my spots today, I managed to recover a 1889 indian head penny and a pre 1900 cufflink. Very sensitive machine I dug a shoe eyelid down around maybe 6 inches and a 17 caliber bullet point down approxaimately 5 inches down, Looking forward to enjoying this machine alot, I was detecting for about 5 hours and my arms feel great .what a nice light machine and balanced extremely well.Ezra.