The Inlight Therapy Facemask Green Pad is ergonomically designed to be placed over closed eyelids for safe and effective Green Light. Green wavelengths have proven effective in the relief and prevention of migraine pain as well as reducing stress and anxiety. Facemask has an ergonomic design for application over closed eyelids10.25” x 5” neoprene flexibility for ease of application anywhere on the skinComfortably secured by a Velcro strap with stretchInlight Therapy PLT therapy pads are interchangeable between all Inlight controllers104 Green (530 nm) diodesController required and sold separately. Illumination Area: 100 cm2Output Density: 5 mW/cm2/secondJoules per cm2 per 20 minutes session: 6.2 InLight Product Warranty Details Order Cancellation: InLight Therapy Products are considered Class 2 Medical Devices. Once used, they are not eligible for return or refund of purchase except due to manufacturer defect. You may CANCEL this transaction, without any penalty or obligation, within THREE BUSINESS DAYS after the date of purchase - as long as product has not been used.