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Dual mode machines are machines which operate with both low frequency pivotal vibration and low amplitude lineal vibration, or spiral vibration modes. These machines are typically private labelled machines from China, and the same machine will be found under dozens of different brand names. Since these machines do not produce high frequency pivotal vibration or high amplitude lineal vibration, these machines are limited to fewer benefits, despite producing both modes. Dual mode machines with spiral vibration, essentially give you only 1 mode that has any scientific basis, since spiral vibration has failed to produce any effect when tested by researchers.