The LED Red Light Therapy Face Mask features 7 LED lights of various wavelengths to help with common skin problems. With a rechargeable design, a touch screen switch, and adjustable strap, this device is simple to use. Its red light wavelength of 630nm can help promote collagen production, reduce wrinkles, and increase skin elasticity. 470nm blue light helps deal with acne and bacteria, while 520nm green light reduces oil secretion. Special 590nm yellow light soothes sensitive skin and reduces spots. 1040nm purple light dual frequency is great for repairing acne scars and 490nm cyan blue light helps boost cell energy and metabolism. Recommended for use once daily for 15 minutes with a paper mask or essence.