The Vertiv Geist Rack Transfer Switch VA7U21A0 is a single-phase, device-level monitored rack PDU with 16 A/20 A, 100 to 240 V, and (6) C13/C19 combination outlets as well as (2) C20 inputs, providing a power capacity of 1.9 kW/3.3 kW/3.6 kW. This device includes a backup power supply for devices connected with just one cable, helping to ensure uninterrupted operation during a power outage. It immediately detects a failure of the primary power source and automatically switches to the secondary power source within 4 to 8 milliseconds. Integrated is the next-generation Vertiv Geist IMD, which displays performance data on its highly visible LCD touchscreen. Through the touchscreen interface, the user can configure their rack PDU without the need for a network connection. It features a redundant power-sharing connection that links two IMDs in the rack and provides backup power during an outage. Enhanced security with Secure Boot in the device helps protect data and operations. The devices are UL-listed and individually tested for functionality and reliability.