TP-Link PLC Adapter Powerline Internet Connection Wired LAN, 2-Unit Kit, Specified by the Ministry of Internal Affairs and Communications TL-PA4010 KIT (Quoted from Amazon description) *Two units only. Please note that cables and instructions (downloadable from the manufacturer's website) are not included. Set of 2 TP-Link PLC adapters. Used without any problems for about 3 years, and stored after removal six months ago. Since it's not an item that is frequently handled, I think there is little wear and tear. Please judge the details from the photos. Even in buildings where radio waves are blocked, such as reinforced concrete, and Wi-Fi doesn't reach, plugging this device into an outlet will make the indoor power wiring work like a wired LAN cable. Although it doesn't provide high speeds, I thought the connection was stable because it's wired. *We do not accept price negotiations or holds. We will ship via Rakuraku Mercari or Yu-Yu Mercari.