This is a BUFFALO Wi-Fi repeater "WEX-1166DHPS". It's a plug-in type that connects directly to an outlet and supports both 2.4GHz and 5GHz. I was using it as a repeater in areas where the Wi-Fi signal was weak, but it's no longer needed since I changed my network environment. There is no instruction manual, so please refer to the manufacturer's website for setup instructions. https://www.buffalo.jp/support/faq/detail/16377.html - Brand: BUFFALO - Model: WEX-1166DHPS - Function: Wireless LAN repeater - Power: AC 100V - Frequency: 2.4GHz / 5GHz Thank you for looking.