This pendant strengthens your biofield, increasing your resistance to the effects of EMFs. Shuzi's patented system uses Nano Vibration Technology (NVT), subtle vibrational frequencies programmed at the nano (molecular) level. These frequencies, which resonate with your body's own vibrations, are imprinted onto a chip. Polished titanium pendant with Shuzi logo etched on the surface; comes on metal link chain; silver chain available separately.