Instant purchase OK Power-on tested Box has a fold, tape residue from label removal, no CD-ROM ≪From the manufacturer's website≫ ・Even on computers without an RS-232C port, this product allows you to use RS-232C devices simply by connecting it to a USB port. You can connect barcode scanners, magnetic card readers, modems, RF-ID tag readers, power supplies, etc. The lack of RS-232C ports that occurs in applications such as POS system integration is resolved with USB. It operates on USB bus power, so an external power supply such as an AC adapter is not required. ・The connector uses a D-Sub 9-pin (male). By using a commercially available conversion connector, you can also connect D-Sub 25-pin devices. ・Compatible with both Windows and MacOS platforms. You can also connect RS-232C devices to Windows servers equipped with USB ports. Please feel free to comment if you have any questions or concerns.