The document discusses the Power Balance wrist band. It claims the band uses performance technology to work with the body's natural energy field to improve balance, flexibility and energy. It says a hologram in the band emits a frequency that interacts with the wearer's electrical field. While there is no evidence it works, proponents claim it could encourage exercise and help the elderly or dancers. It has been endorsed by athletes but scientists say there is no possibility it works as claimed in the short term.