Line-Interactive Digital UPS System offers voltage regulation, surge suppression & long-lasting battery support for personal computers, network workstations, home entertainment systems & media centers. Automatic Voltage Regulation (AVR) circuits regulate brownouts & overvoltages back to usable 120V levels without using battery power. Dataline surge suppression protects standard dialup / DSL & Ethernet connections. Built-in USB & DB9 serial ports enables optional unattended system shutdown without data loss in case of extended power failure. Built-in audible alarm & large LCD front panel voltage display indicates line power status, battery power status, battery low / replace status & voltage boost operation. Versatile design supports upright tower, flat shelfmount or 2U rackmount installation. Protection Type: DSL; Ethernet; Modem; Phone; Power; System VA: 1,200 VA; Backup Time at Half Load: 12 minutes @ 350 Watts; Lines: 1.