Took it on an actual hunt locally for about 45 minutes and after Fisher gave me new coil, software and battery hardware and its a different unit and yes I rescinded it from the classifieds....Heres my post Wow almost made a mistake...came back from Fisher like a new unit workwise so its a keeper..Afraid you will have to put up with me for now and the guys and gals on the CZ forum must be cheering...Heck only had the sens. at 50 and it was quiet and air tested a quarter at a foot and surely didn't want to dig that deep in a local park loaded with many people...