MEDISEND®protect The smallest magnetic field device in the world. Provides for your personal „shield" against electrosmog everywhere. MEDISEND®protect – it looks like a memory stick and is the world’s smallest magnetic field device. ... it is operated via any USB port on your PC / Mac /laptop. … generates a natural and complex electromagnetic field of 7.8 Hz, the fundamental of the Schumann-frequency spectrum. Uniquely, in contrast to all other magnetic field devices, MEDISEND®protect also generates the geomagnetic-frequency spectrum! … the Schumann-frequency spectrum of 7.8 Hz is modulated with a frequency of 1.2 Hz. This frequency has also proved to be highly effective against electrosmog (particularly cellphone radiation). … the effective range of the MEDISEND®protect is approximately 40 cm (80 cm in diameter). There are no time stipulations for its use. Make it easy for yourself: When working on your PC / Mac or laptop, simply plug your MEDISEND®protect into a free USB port. … only current is drawn via the USB port; therefore no problems whatsoever are encountered with other user programs on your PC / Mac or laptop.