Product features - DPL precise narrow spectrum technology. 3 modes for solving your problems! Brighten mode: use only once for full face rejuvenation Redness mode is for reducing your facial redness. Whiten Mode for reducing light spots and acne marks. - Sapphire cooling surface area: Light waves act on the dermis of the skin and generate heat that positively affects the circulation Sapphire-based technology can protect the skin surface and prevent heat damage -Three modes, full whitening effect, all in one device: Skin care refuses "Surface-level solutions" Only by solving the root of the problem can you achieve a real whitening effetct. Why choose JOVS Blacken Photorejuvenation Device? 1.More affordable: Long term use higher cost perfomance and the same DPL Technology as beaty salon. 2.Easy and convenient: 2-3 times a week at home. 3.Certified, more reassuring to use.