Also be sure to buy and connect the Zigbee Coordinator radio adapter via powered USB 2.0 hub and/or via a long USB extension cable if your Synology has a USB 2.0 port, but do not connect the Zigbee Coordinator radio adapter to a USB 3.0 port, and also make sure to keep it away from any external USB 3.0 peripherals/devices such as example external USB hard drives. Read and follow → Zigbee networks: how to guide for avoiding interference + optimizing using Zigbee Router devices (repeaters/extenders) to get best possible range and coverage