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Authorized dealer, includes app access! #1 Easiest and inexpensive way to test gold and silver for fakes. Allows you to easily ping coins and use an app on your phone to sonically match the signatures to known authentic ones. Includes the Pocket Pinger, extra silicone tips, stack stick, videos to help you learn how to perform the ping tests properly, videos on how to spot fakes, and how to use the app.