used no box or instructions , I used youtube video to install. pack of 2 equals 4 devices as seen in pictures. The TP-LINK AV600 Nano Powerline Adapter TL-PA4010KIT is a compact and efficient device that allows you to extend your Ethernet network with a maximum LAN data rate of 100 Mbps and a maximum powerline data rate of 600 Mbps. This kit includes two powerline adapters, each measuring 5.2cm in length, and features a single Ethernet port for easy connectivity. The adapter is in a sleek white colour and is designed by the reputable brand TP-LINK. Perfect for improving your home networking and connectivity, this powerline adapter is a reliable and convenient solution for expanding your computer or tablet's access to the internet.
eBay