Sling Media Slinglink Turbo W1 Ethernet Over Power Adapter Package includes 1- HomePlug Adapter, 1- Ethernet Cable and instructions. This is a single SlingLink. Most applications will require two. A 2 pack is available at a discounted price - search for B07HFG3RRJ Easy to install and setup. Enables network access where power outlet is available They communicate over the electrical wiring in your home. SlingLinks installed in homes with older wiring may have slower speeds. Each SlingLink must be plugged into circuits that connect in the same breaker box (most homes only have 1 breaker box, so this is usually not a problem). Make sure each SlingLink is plugged directly into a wall outlet. Do not plug into a surge protector as it may filter out the signal.