The Vertiv Geist Rack Transfer Switch VA4U2100 is a versatile rack power distribution unit (rPDU) with a transfer switch. It is a 16A/20A, 120V/208V/230V, single phase, unit level monitored rack PDU with 12 Combination C13/C19 Outlets and dual input C20 plugs that provide 1.9kW/3.3kW/3.6kW in max power capacity. The RTS provides redundant power to single corded devices and helps ensure continuity in the event of power loss. It can quickly detect power loss on the main source and automatically switch it to the secondary source in 4 to 8 milliseconds. The Combination C13/C19 Outlets accommodate C14 and C20 plugs interchangeably, offering flexibility for ever-changing requirements. High-retention outlets reduce the risk of costly downtime from accidental disconnections of the power cord and are also P-Lock compatible. The Interchangeable Monitoring Device provides unit level remote power monitoring.