What's the strength of the Groove Belt magnet? Is it safe around pacemakers, phones, etc.?

The Groove Belt™ high strength neodymium magnets are N42 magnets, which have a Br (unit of measurement for Gauss for residual flux density) of 13,200. It is safe for use around your phone. We do not recommend our belt if you have a pacemaker or any other medical device that may be affected by magnetic fields. Please consult with your physician if you have further questions.