Power protection and battery backup for home and office computers, electronics and small servers. This line-interactive UPS system protects your valuable equipment from damage, downtime and data loss. This UPS system has a feature called automatic voltage regulation (AVR) that solves the problem. The UPS detects when input voltage is out of bounds and corrects it without using the battery. All Tripp Lite UPS systems also include built-in surge protection and noise filtering to shield your equipment from destructive transient voltages and electromagnetic (EMI/RFI) line noise. Data lines connected to your equipment represent an unlocked "back door," allowing surges to enter and damage or destroy sensitive electronic components. In addition to protecting against surges on the AC power line, this UPS system protects your equipment against surges on connected phone and network lines. The illuminated LCD screen shows a variety of helpful data, including input voltage, battery capacity, power status, battery status and AVR status. System VA: 1500 VA Backup Time at Half Load: 11.8 minutes @ 450 Watts Automatic Voltage Regulation (AVR): Yes Battery Recharge Time: 8 h. Unit of Measure : Each