The used Cisco PWR-2911-POE 2911 AC Power Supply with Power Over Ethernet (POE) is a power supply unit designed for Cisco 2911 routers. It delivers AC power to the router and also provides Power over Ethernet (PoE) capabilities to enable the router to power connected devices, such as IP phones or wireless access points. This power supply unit has been previously used but has been tested and certified to be in good working condition, making it a cost-effective option for those looking to upgrade or replace their existing power supply unit. With its PoE capabilities, the Cisco PWR-2911-POE power supply unit simplifies the deployment of network devices by eliminating the need for separate power sources.