Instant purchase OK Power-on tested Tape residue from a label is present. All accessories are included, but the box shows signs of age. ≪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). 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 a Windows server equipped with a USB port. If you have any questions or concerns, please feel free to comment.