This 9PX rack-mount online double-conversion UPS system features hardwired input and output connections. It provides reliable battery backup and AC power protection against blackouts, brownouts, surges and line noise that can damage valuable IT equipment or destroy data. The 9PX3K3UNP2 is superlative power management for education, commercial, financial or healthcare networking components, including Cisco switches and servers. Expandable Internal Battery Backup Keeps You Operational Through Power Outages The field-replaceable, hot-swappable valve regulated lead acid (VRLA) battery modules allow you to work through short power failures and give you enough time to safely save files and shut down your system in case of a prolonged blackout. Exclusive ABM technology increases battery life by 50 percent and closely monitors battery health to provide advanced notice when batteries need replacing. You can also connect up to four extended battery modules (9PXEBM180RT, sold separately) for hours of extended runtime. Included Distribution Module Helps Accommodate a Range of Connected Equipment The 9PXPPDM2 PowerPass Distribution Module allows a step-down voltage from 208V to 120V to permit connection of a variety of IT components. It also features a maintenance bypass, which lets you service or replace the 9PX3K3UNP2 without powering down any connected equipment.