OPTI-UPS TS1700B (1500va, 900w) Line Interactive UPS Battery Backup with AVR Surge Protection - 5 Outlets (Black) - Uninterruptible Power Supply (RS232 / Serial Port) 1500VA / 900W UPS Battery backup system, 50 / 60 Hz frequency auto sensing and selection 3 Year Limited warranty / live US support Line interactive - corrects voltage without using battery power Short circuit and overload protection to prevent data loss Tel / Modem / LAN surge protection, free OPTI-SAFE Sentinel software History record of power failure events, smart power management software Scheduled shutdown & reboot, extended battery run time - 2 internal batteries, uninterruptible power supply (UPS) Energy saving function (UPS green mode), cold start function (DC power on), boost and buck AVR (Auto Voltage Regulation), simulated sinewave design RS232 (Serial) Communication Port 5-outlet line interactive uninterruptible power supply Maximum capacity: 900 Watts 5 NEMA 5-15R battery backup outlets Surge energy rating: 265 Joules 6.5 minutes of battery backup at half load, and 2 minutes at full load