... the oxygen spa at your bathtub.With certificates of GS, ROHS, CE, LVD, EMC ,UL,SGS ,JET, SAA , etc ... can be put anywhere on the bath tub.5) Adjustable spray nozzle to change stream to desired ... and negative ion and bio electricity those are good for health of body, especially in smoothing skin, dispelling ... to plug: 2.8M Tourmaline (ION): Home whirlpool bathtub massager CE Rohs GS,PSE,UL certificates