Internal UPS circuits provide support for PCs during power failures, enabling a safe shutdown without data loss. Automatic Voltage Regulation (AVR) regulates brownouts back to usable levels without using battery power. USB port enables optional unattended system shutdown without data loss in case of extended power failure. Dataline surge suppression offers protection for equipment with standard dialup, DSL or Ethernet line connections. Audible alarm and front panel LEDs indicate UPS system and line power status. Hot-swappable battery replacement makes changing batteries a snap. Protection Type: DSL; Ethernet; Fax; Modem; Phone; Power; System VA: 1500 VA; Backup Time at Half Load: 8.5 minutes @ 470 Watts; Lines: 1.