As the name PRANA suggests, Maysama PRANA LED Light Therapy Mask uses pulsed light technology to help 'breathe' skincare ingredients into your skin, to increase the bioavailability of active ingredients and increase the efficacy of your skincare. Maysama PRANA uses pulsed light at a frequency of 100Hz, which is not visible to the naked eye, so is comfortable to wear. Research studies confirm that pulsed LED light forces cells to uptake nutrients from skincare due to Transmembrane Convection. LED Light Therapy increases the volume of the cytosol, the fluid inside the cell, causing it to expand. When the light is switched off, the cell contracts. When light irradiation is used in pulsed mode, cells 'breathe' in and out as they expand and contract. As the cell contracts it breathes in nutrients surrounding the cell. Maysama PRANA LED Light Therapy Mask uses pulsed LED light technology with science-backed wavelengths at 630, 660, 850 and 450nm. These wavelengths have been shown in clinical studies to increase collagen and elastin production, contributing to the reduction in the appearance of fine lines and wrinkles. Blue light helps with the treatment of acne. Product Specification Wavelengths: red 630nm & 660nm, near infrared 850nm and blue 450nm Modes 1: red only Mode 2: red + near infrared Mode 3: magenta (red + blue) Pulsed Light Frequency: 100Hz