Eaton 5S550 550VA UPS Battery Backup & Surge Protector delivers reliable uninterruptible power supply and surge protection for home office and small business electronics. This line-interactive UPS features 330W power capacity, automatic voltage regulation AVR to correct voltage fluctuations without draining the battery, and eight NEMA 5-15 outlets for seamless battery backup and surge suppression. The integrated 6 ft power cord and external USB management interface connect to Windows MacOS or Linux systems with free Eaton UPS Companion software. LCD display and audible alarm provide real-time status on input voltage 120V AC 93-138V, battery runtime and load capacity. RJ45 network surge protection safeguards data and phone lines. EcoControl master and controlled outlets maximize battery runtime by powering off nonessential devices. Lead acid battery technology, circuit breaker protection, FCC Class B certified and UL 1778 compliant ensure dependable performance. Compact black form factor fits under desks or on shelves. Includes three year limited warranty and ACE 3 year support. Keywords UPS battery backup surge protector line interactive AVR LCD USB RJ45 NEMA 5-15 550VA 330W uninterruptible power supply voltage regulator 120V emergency power off