This has Dual Functions Normal image and UV image. UV image Function Shows pimples, keratin layer, dark spot, discoloration, pigmentation, etc. Sales promotion by shocking image of customer. Semi-Zoom Lens: No need to exchange Lens, Magnification rates(X1~X80) can be easily controlled by semi-zoom focus ring. High Resolution: Reproduce vivid images with high resolution Lens and NTSC / PAL, High Luminance LED, Life long light, and Provides vivid images.