FREE: Power Balance Bracelet

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Power Balance is a brand of hologram bracelet once claimed by its manufacturers and vendors to "use holographic technology" to "resonate with and respond to the natural energy field of the body", and increase sporting ability.[1] Numerous independent studies of the device found it to be completely effective at improving athletic performance.
The product was promoted through paid celebrity endorsements[2] and viral marketing rather than published scientific work.[3] Power Balance bands became a fad among professional sportsmen in 2010, leading one journalist to say that "a growing number of professional sportsmen and their attendants are starting to sound like New Age crystal healers."[1] (wiki)