Intelligent battery management lets you know when battery is disconnected or needs to be replaced for maximum ease-of-use. Award-winning shutdown software automatically turns off your computer system in the event of an extended power outage. Battery failure notification lets you know before any damage can occur. Audible alarm delivers a continuous tone when close to overload. LED status indicators shows the status of battery and notifies you of building wiring faults. USB connectivity provides exceptional versatility. System VA: 550 VA; Backup @ Time: 330 W @ 3.3 min; Alarm(s): Audible; Automatic Voltage Regulation: Yes.