This APC Rack ATS (Automatic Transfer Switch) is a rack-mounted power redundancy device that automatically switches connected equipment between two independent power sources (for example, two separate UPS units or utility feeds) if the primary source fails or is disconnected, without interrupting power to the connected gear. It's rated 230V/16A with a C20 input connector, and provides (8) C13 and (1) C19 output sockets for connecting servers, switches and other rack equipment. This is a data-centre/server-room infrastructure product for IT teams building dual-power-feed redundancy into a rack, not a general-purpose power strip, and is typically paired with dual-corded servers or switches that themselves support two power inputs.