The Cisco 341-0011-01 BO, also known as ASTEC model number AA21520-A , is an industrial power supply that operates with an input voltage of 24 to 60 V DC and a maximum output power of 250 Provides wattage. This product is designed for use in Cisco equipment and is used in network applications, especially for Cisco 3660 series switches and routers. Its output voltage includes multiple levels, including +12.2V, +5.1V, and -12V, which support the multiple voltage requirements of complex network systems. This type of power supply is generally popular in the network and data center market due to its stable performance and long life, and its price for used units usually ranges from $90 to $200, although the exact prices depend on the physical and functional condition of the device. These power supplies are mainly produced in the Philippines and have the CE mark, which means compliance with the safety and quality standards of the European Union.