Tripp Lite's OMNIVSINT800 line interactive UPS system offers voltage regulation, surge suppression for sensitive electronics. Internal UPS circuits support entry level PC systems for up to 40 minutes during power failures. Automatic Voltage Regulation (AVR) circuits regulate brownouts as low as 159 volts back to usable levels without using battery power. Includes 4 outlets with battery support and AC surge suppression. USB port enables unattended system shutdown without data loss. PowerAlert software available via free download from www.tripplite.com. Built-in single line RJ phone suppression jacks protect modem, fax machine, cordless phone or other peripheral with a standard dialup/DSL phone connection. Built-in audible alarm and 4 front panel LEDs. 800VA power handling ability supports entry-level PCs, network workstations, point-of-sale equipment, small business phone systems, audio/video equipment and home theater systems. Supports battery replacement via built-in access panel.