The Xiaomi Mesh System BE3600 Pro offers flexible coverage options based on the number of units used. A single unit (1-pack) is ideal for covering 2-3 rooms, while a 3-pack setup can provide coverage for 7-9 rooms, making it suitable for both small and large spaces. Additionally, the system supports a wide range of connected devices, with a maximum of 128 devices supported on a single unit. When using the 2-pack or 3-pack version, it can handle up to 256 connected devices, providing robust connectivity for households or offices with multiple smart devices.