Not suitable For Black or Dark Brown Skin Tone: Darker skin contains more melanin than fair skin. If you use IPL devices onto melanin-rich, dark skin, the IPL could transfer heat energy onto the skin cells, causing discoloration. This device uses advanced science and ipl technology to in the hair follicles to force hair follicles to be dormant and prevent hair regrowth to get results. It is more than enough for whole family treatment that can give all desired results effectively.No replacement of cartridge is needed during ipl hair removal treatment. This is very economical and time saving compared to expensive beauty salons and clinics, this hair remover machine can save more money and time for same treatment effect at beauty salons and clinics. Painless Hair Removal At Home: ,Save Money. No replacements or refills needed. Convenient: Anyone can use the device safely from head to toe including upper lip, chin, underarms, legs, arms, and bikini area. for women and man. IPL Cooling Hair Removal Device. FZ608.