The Cisco FPR4K-PWR-DC-950 Firepower 4000 950W AC Power Supply Module is a hot-swappable power supply module designed for the Cisco Firepower 4000 Series. This unit is compact, measuring 3 inches in height, 15 inches in length, and 2 inches in width. It is designed to provide reliable power supply for servers and networking equipment, with DC input and DC power terminal connectors for easy installation. With a unit quantity of two, this product is ideal for enterprise networking setups that require high-quality power supply solutions from a trusted brand like Cisco.