Cisco Redundant Power System PWR-RPS 2300 Dual PSU C3K-PWR-1150WAC
. very neat and working
The Cisco RPS 2300, a redundant power system, offers power supply redundancy and resiliency for network devices, supporting up to six devices with a single RPS unit, and can back up two switches simultaneously. It utilizes modular power supplies (750W or 1150W) and features a replaceable fan module