... the circulation of blood and promote the metabolism.2) Bubble option for joyful comfort.3)Main ... part DC12V low voltage, definitely safe for human body.4) Extra long power ... and negative ion and bio electricity those are good for health of body, especially in smoothing skin, dispelling tiredness, and in-force immunity.7) With ... ION): OXYGEN-ION TURBO SPA WITH GS, ROHS, CE, LVD, EMC ,UL,SGS ,JET, SAA