Instant purchase OK No box, 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, and more. The lack of RS-232C ports often encountered in POS system integration can be resolved with USB. It operates on USB bus power, so an external power supply like 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.