TP-LINKs powerline adapter TL-PA251 takes advantage of your homes existing electric wires to transfer data while transferring power. That means, with no additional wiring required, users can simply plug the TL-PA251 into existing power sockets & establish networking infrastructure in a flash. With an additional integrated power socket, it solves a common powerline problem where power sockets would be blocked & thus unusable for other devices. Adopting a totally new product design, the TL-PA251 enables high data transfer rates of up to 200 Mbps over a homes electrical circuit for up to 300 meters with an Auto Power-Saving Mode that reduces energy consumption by up to 75%. Integrated power socket to allow additional devices access to power Mains Filter for better powerline communication performance Home Plug AV standard compliant for high-speed data transfer rates of up to 200 Mbps Plug & Play, no new wires or configuration required Patented Power-Saving Mode automatically reduces power consumption by up to 75% Please note: networking components such as Powerline adapters require that all adapters must work within the same Home Plug standard to remain compatible, for example Home Plug AV (HPAV) adapters with communicate with other HPAV Powerline components, regardless of whether they are 200 Mbps or 500 Mbps. Older 85 Mbps adapters work on the different Home Plug 1.0 standard & are not compatible with Home Plug AV adapters Please note: networking components such as Powerline adapters require that all adapters run at the same Powerline speed to remain compatible, for example only 200 Mbps adapters with communicate with other 200 Mbps Powerline components. However, all Powerline products will connect to any switch or router Ethernet port. Powerline adapters can be used with extension leads (except surge protection ones), & will work across different ring mains so long as they share a common fuse box.