Thank you for viewing. Japanese Antenna CATV Upstream Amplifier. This item was generated upon cancellation of a J-COM internet service, and I was told I didn't need to return it when I canceled. It was used and working until June of this year. It has been removed since then, so I haven't been able to confirm its operation. Everything in the photos is included. Please understand that this is an as-is sale. Also, please purchase only if you know how to use it.