Devolo

devolo AG was founded on 1 May 2002 in Aachen, Germany, and specialises in the development of communications devices for private consumers and industrial applications. Its product range includes devices for DSL, ISDN and analogue Internet access as well as home-networking solutions using cabled Ethernet, Wireless LAN, or, mainly, existing electrical wiring (HomePlug with Ethernet, USB or WiFi).

...
Wikipedia