tripp lite internet550ser 550va 300w ups desktop battery back up compact 120v db9 rj11 pc, 8 outlets,black

PROTECTS FROM BLACKOUTS, BROWNOUTS & TRANSIENT SURGES ALLOWING TIME TO BACK UP CRITICAL FILES: 550VA / 300W Battery Backup Uninterruptible Power Supply (UPS) provides up to 1.2 minutes of runtime for a full load, and 5 min of half-load runtime 8 OUTLETS POWER & PROTECT CONNECTED PERIPHERALS: 4 Outlets provide UPS Power Backup & Surge Protection (home office & media centers); 4 Outlets offer Surge Protection Only (ideal for printers & other electronics not essential in a blackout) FREE MANAGEMENT SOFTWARE / USER REPLACEABLE BATTERIES: Software enables unattended system shutdown & power management. Batteries are user-replaceable allowing you to extend the life of your UPS if the batteries are depleted after the 3-year warranty. 3-YEAR WARRANTY, $100,000 INSURANCE: 3-Year Limited Warranty and $100,000 Ultimate Lifetime Insurance for connected equipment.