Nikken 13201 Magboy Kenko Magduo - Compact, portable and a quick, effective means of relieving soreness, stress or fatigue – the Kenko MagDuo is all of the above. Employing principles derived from nature, this advanced pair of massaging spheres can soothe aches, reduce tension and reenergize, in minutes! Massage is known to provide relief for sore muscles, tension and discomfort. The MagDuo combines massaging action with Nikken TriPhase® Technology, for an enhanced relaxation experience. Featuring patent-pending DynaFlux™ Magnetic Technology, the MagDuo incorporates a series of magnets at varying gauss strengths between 800 and 1000. These are placed in polar opposition at several points. The result is that the magnetic field is intensified, for greater depth of penetration.