Serial conversion adapter (model number: USB-RSAQ6) from I/O DATA. Connects to the USB port of a PC that doesn't have an RS-232C port, allowing communication with serial devices. I downloaded the driver and confirmed it works correctly on my PC (Windows 10). There are no noticeable scratches or stains, but there are some minor scuff marks. (See images 2 and 3) Instruction manual and outer box are not included. I will carefully clean it with消毒用アルコール (disinfecting alcohol) before shipping. Shipping will be via Nekopos. It will be delivered to your mailbox, but I will wrap the adapter in bubble wrap and then put it in an envelope, and protect it with a plastic bag as a rain measure. Please consider purchasing if you are interested!