Instant purchase OK No box, tape label residue, no manual, no CD-ROM ≪From the manufacturer's website≫ ・Even with a computer that doesn't have an RS-232C port, you can use RS-232C devices simply by connecting this product 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). You can also connect D-Sub 25-pin devices by using a commercially available conversion connector. ・Compatible with both Windows and MacOS platforms. You can also connect RS-232C devices to Windows servers equipped with USB ports. If you have any questions or concerns, please feel free to comment.