AVR Series Line-Interactive UPS System offers 550VA ultra-compact line-interactive protection for PCs and workstations. System maintains 120 volt nominal output over an input range of 83 to 147 volts. Workstation-optimized features include USB port (HID-PDC compliant), single-line telephone/DSL surge suppression, space-saving right-angle input plug, four battery/surge-protected outlets and four additional surge-only outlets (8 total). USB port (included cable) works with free unattended shutdown software. Housing is mountable.