This device uses the same phototherapy treatment developed by dermatologists to help heal skin blemishes 55% faster than if left untreated. It administers moderate heat to open clogged pores and uses green and red phototherapy to eliminate p-acne bacteria, the most common cause of acne. Eliminating the need for prescription medications, the device also reduces painful, unsightly swelling that accompanies acne pimples. Simply place the device on a blemish for two 10-second intervals (with five seconds in between) and it automatically delivers the phototherapy with the push of a button. Provides 40 treatments after a four-hour charge. 3 2/3" L x 1 2/3" W x 1" D. (3 3/4 oz.)