Tripp Lite AVR550U 550VA 300W UPS Desktop Battery Back Up AVR Compact 120V USB RJ11. Power problems—including blackouts, brownouts, power surges and line noise—threaten your investment! They can damage or destroy PCs and other expensive equipment, wipe out valuable data and files, and degrade component performance. Get protected against these all-too-common power threats with Tripp Lite's AVR550U desktop UPS system. It provides reliable battery backup that can keep a basic desktop PC operational for up to 17 minutes during blackouts. Automatic voltage regulation (AVR) corrects low-voltage conditions (brownouts) back to safe 120V power without draining the UPS battery. Surge suppression and EMI/RFI line noise filtering prevent hardware damage and performance problems such as poor-quality audio and video output. The AVR550U's 550VA/300-watt power rating provides ample capacity for a wide range of home and office PC setups, workstations, point-of-sale systems and more. It features 4 battery-supported AC outlets for computer, monitor and other vital system peripherals, plus 4 surge suppression-only outlets for accessories not requiring battery support. One set of tel/DSL (RJ11) jacks protects connected equipment on a tel/DSL line. One USB communication port plus free PowerAlert software (available from Tripp Lite via Web download) enables unattended system shutdown and file saves in case of a prolonged power failure. The AVR550U comes with $100,000 Ultimate Lifetime Insurance coverage for connected equipment (USA/Canada only) and a 3-year product warranty. Buy this product and Get Free Shipping on a Tripp Lite AVR550U 550VA 300W UPS Desktop Battery Back Up AVR Compact 120V USB RJ11 for $60.99 at Rakuten.com, a $52.41 Savings!