This is an MC phono equalizer from Gohken Lab, a well-regarded garage manufacturer of phono equalizers. Purchased in November 2024. Operation has been confirmed. Includes a dedicated power cable and a delivery note/receipt. I mainly used it for listening to monaural records with a DENON AT33-MONO. Thanks to this unit, I was able to use the DENON DL-102, which was previously difficult to handle. The equalizer curve can be switched between three types. In addition, the impedance can be switched depending on the type of cartridge. The delivery note/receipt includes a simple setup guide. There are no major scratches, but it is a used item. Thank you for your understanding. There was no original outer box, so it will be carefully packed with air padding before shipping. I am a non-smoker, and I do not have any pets. Thank you. Manufacturer's product explanation: https://sites.google.com/view/gohken/Home/lineup