Suitable for all skin types, no side effects. Any combination of red and yellow three basic colors generate seven colors. Good quality product, 1 year warranty, guaranteed strong light and results. Increase skin elasticity and improve circulation, stimulates collagen production which smoothes fine lines and wrinkles. It is stand-free, hands-free, flexible, lightweight and portable new Photons led Light Therapy Device,0.04W each bulb,total 504bulbs,the working size is 16*8inch.