I did see this re the software, open source coding is a little concerning. I would personally not be using it for any significant finds.
SOFTWARE
Certain components of the XChange2 PC software application for use in conjunction with the Minelab GPZ 7000 are subject to the GNU General Public License, Version 2
(GPLv2,
www.gnu.org/copyleft/gpl.html), or other open source licenses (Open Source Software). In compliance with the terms of these Open Source Software licenses, the
Open Source Software that Minelab uses, modifies and distributes is made available to the public, in source code form, at
www.minelab.com/open-source. Complete details
of the applicable licenses can be downloaded from this website, and can also be found on the installation CD for the software that is included in the box with the GPZ 7000
detector.
Minelab, GPZ 7000, ZVT, Super-D, Wi-Stream, GPSi, FindPoint, GeoHunt, GeoStore, GeoTrail, XChange Your Detecting Connection, PRO-SWING 45, J-strut,
R-clip, S-cuff are trademarks of Minelab Electronics Pty. Ltd. Google Maps is a trademark of Google Inc.