HomePlug is the family name for various power line communications. Here we have HomePlug devices for network/data communication through a home electrical circuit. Useful for extending a wired network when a wireless network is not possible due to thick walls for example. The plug units feature a RJ45 network port to plug in a network cable. Advanced features include secure transmission between the plugs, wireless access points and the ability to add extra plugs with some products. Check the individual specifications of a product to confirm what features are available.