... three times magnifier-glass.4. With purple light magnifier-glass, for checking the currency. distinguish the true from the false . ... Window 98/2000/ XP/ WIN7/ VISTA/ MAC5, Wide used for external storage devices, scanners, printer, DVD Driver, CD-RM driver ... , Digital Camers/Camcorder. . Pocket Magifier glass with Purple light for checking money, 4 ports USB Hub, OEM/ODM factory, best for promotion