HS772 LED Photophysical Therapy Facial Whitening & Skin Rejuvenation Treatment Instrument is an advanced beauty device based on Photodynamic Therapy (PDT) technology. By emitting cold light of specific wavelengths, the instrument penetrates deep into the skin surface and is able to effectively penetrate into the subcutaneous fat layer, converting light energy into intracellular energy, which in turn stimulates capillaries and promotes cell growth and circulation. Its main effects include skin rejuvenation, skin tightening, spot removal, wrinkle removal, acne removal, acne removal and skin texture improvement, providing users with an ideal beauty experience.