Vertiv Liebert GXT4, 1500VA/1350W, 120V On-line, Double-Conversion Rack/Tower Smart UPS (GXT4-1500RT120) ONLINE RACK SMART UPS: Reliable, easy-to-manage power protection and battery backup with 1500VA (1350W) capacity POWER PROTECTION: On-line, double-conversion technology protects against outages and every type of power disturbance ENERGY EFFICIENT: Power is conditioned without drawing on battery, extending battery life PERFORM UNINTERUPTED: Seamless transfer to battery power keeps equipment running uninterrupted during an outage HOT-SWAPPABLE BATTERIES: Provide up to 6 minutes of runtime at full load with the ability to add up to six external battery cabinets for extended runtimes