Startechcom pex4s553 4 port pci express card rs232 serial adaptor card with 16550 uart barcode 0065030843553 depth 120 cm description applications self service automated machines and kiosks to control serial devices such as scales touchscreens magnetic card readers bar code scanners receipt printers label printers bull pos retail applications in grocery stores and any other retail store to control keyboards cash drawers receipt printers card readers card swipes scales and elevated displays