There are two English letters written on the back of the lenses. sr = Skin Rejuvenation Lens : To produce collagen and get rid of melasma, wrinkles, dark spots, and lighten the skin. ac = Acne Care Lens : To remove acne under and outside the skin and close pores. hr = Hair Removal Lens (used for all body areas: face, mustache, hands, legs, armpits) And unlimited flashes (Personal use) Location: Riyadh Al-Khobar