The PD20 Photo Digitaizer from Wolverine is a flatbed scanner that scans a single 3 x 4", 4 x 6", or 5 x 7" photo in only 5 seconds. It converts a photo into a 20 megapixel digital image that can be stored either on the internal memory or an SD/SDHC card. It is a stand-alone unit that does not need to be connected to a computer to scan photos. The digital images can be transferred to a Mac or PC computer by using the included USB cord, or from your memory card without any software or drivers.