MR-2121 is a Photon Therapy RF Skin Rejuvenating Device, That combines RF, EMS, Red and Yellow LED light Functions.EMS mode adopts the RF,EMS, and 633nm wavelength red light for face lifting and brightening. RF mode with 590nm wavelength yellow light, stimulates collagen and elastin production, resulting in smoother, youthful skin. EMS mode works with a 3D roller head for face lifting and firming.