Last one in stock! Now impossible to find, these small wearable devices were used by politicians, spies, embassy personnel and military while working in Germany and Eastern Europe during the Cold War. The local magnetic field they produced acted as a “bubble” to balance and protect the wearer from the harmful physical and psychological effects of targeted electromagnetic frequencies. For the first time ever on offer a modernized version of this same technology for you and your family. The Cold War ended long ago but electromagnetic pollution has only gotten worse in recent years, a problem that we know all too well. Its time we re-discover these highly effective technologies of the past to deal with our modern problems and it is in this spirit that we offer the Halo Pulse Magnetic Pulser Units. These wearable battery powered devices are fully adjustable in even increments from 2hz to 24hz to allow for a full range of use. And you will be getting the best on the market. We are not medical professionals and can’t legally make medical claims, but the positive effects of magnetic entrainment are well known and backed up by decades of clinical and academic research. Pulse Frequency Range: 2 to 24hz (fully adjustable, includes the Schumann Frequency). Powered By: One CR 2032 watch battery (included). Operational Time: Up to 650 hours per battery. Size: 2 1/4″ x 1 1/4″ x 1/2 (the size of a pack of Tic Tacs).