This is an Acoustic Revive product that plugs into an empty LAN port. I am selling one of the three I own. It is a beautiful item, purchased new and only plugged and unplugged once or twice. It was used with a Wi-Fi router in a smoke-free, pet-free environment. It was used and stored in a room with humidity control. I am selling it to organize my audio equipment due to changes in my living situation. Depending on when you purchase it, I can ship it the same day. I will pack it carefully for shipping, so please rest assured. I own three of the same product, including this one. If you purchase them together, I will sell two for 28,000 yen and three for 40,000 yen. I will relist them as a dedicated listing, so please let me know if you are interested. *Please note that it may be sold out. *Manufacturer's price: 19,800 yen (including tax) *Search keywords RLT-1 RTL1 RTL-1 Network audio Network audio Streaming Noise reduction Kanamaru Takashi Kanai