This is an ATEN three-phase rack PDU (power distribution unit) rated 30A/32A, with 30 switched outlets and "eco" energy-management features (typically per-outlet or bank-level power monitoring to track and reduce energy consumption across the rack). Three-phase power distribution is used in larger data-centre or server-room installations where load needs to be balanced evenly across three incoming power phases rather than a single-phase feed, and having each outlet individually switched allows remote power-cycling of hung equipment or scripted power sequencing without a technician at the rack. This is aimed at higher-capacity, larger-scale rack deployments rather than a small office server closet.