This is an acoustic revive noise reduction product that plugs into an empty LAN port. I am selling one of the three I own. Purchased new four years ago, it's in excellent condition, having been plugged and unplugged only once or twice. 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. *Manufacturer's suggested retail price: 19,800 yen (tax included) *Search keywords RLT-1 RTL1 RTL-1 Network audio Network audio Streaming Noise reduction Kanamaru Takashi Kanai