The Xiaomi Mesh System BE3600 Pro supports Mesh pre-pair. For the 2-pack or 3-pack versions of the product, the routers are pre-paired at the factory, simplifying the setup process. Once the network configuration of one router is completed, simply power on the remaining routers, and they will automatically connect to form a Mesh network. This seamless process eliminates the need for manual pairing, making it easy to expand your network without any hassle. It ensures a smooth, efficient connection between routers for consistent coverage throughout your home.