Cisco 2821 and Cisco 2851 AC inline power supply
Cisco PWR-2821-51-AC-IP=, 100 - 240 V, 47 - 63 Hz, Server, 1U, Cisco 2821/2851, Metallic
Cisco PWR-2821-51-AC-IP=. AC input voltage: 100 - 240 V, AC input frequency: 47 - 63 Hz. Purpose: Server, Power supply unit (PSU) form factor: 1U, Compatible products: Cisco 2821/2851. Product color: Metallic