Multi-Device Content Preview Labs with Real Device Racks

Multi-device content preview labs on real hardware require stable rack infrastructure: - **Density** — motherboard boxes for headless tasks; full phones when UI validation matters - **Network** — per-cluster routers when account isolation needs distinct IP space - **Cooling** — continuous charging generates heat; plan rack fans + room HVAC - **Operations** — slot maps, account CSV per device, spare USB cables We supply racks and modules from Guangzhou. Content policy and platform ToS compliance are buyer responsibilities.