The unit is new as of Today! It sends false higher pitches whenever I extend the coiled wire by moving the probe. I've disconnected the wire and re-mounted it several times without change. The unit does seem to find coins within 2-4", but I can simply stand, hold out the probe in my right (ringless, watchless, metaless) hand, and it sounds off with the high pitch sound like when you hit a coin. It definitely sounds like a short in the wire connection. Is this NORMAL? I can't use this thing if this is normal, as it falses as much as it finds coins in my target garden. I haven't inserted the probe into the soil yet, but was testing it for settings and depth when I discovered the (sigh) falsing. Anyone have any solutions/answers to this P.I. unit? I have read lots of reviews, but no one complained of this. Thanks!