TRIPP LITE's AVR Series 120 V 900 VA 480 W ultra-compact line-interactive UPS with USB port. Six (6) UPS battery supported outlets, six (6) surge-only outlets. USB port, TEL/DSL protection, Wall mountable, 98% efficient. NEMA 5-15P input plug and twelve (12) NEMA 5-15R outlets. Offers complete power protection for desktop PCs, network workstations, and a wide variety of professional and consumer electronic devices. Uninterruptible power supply (UPS) circuits switch to battery backup mode within milliseconds to keep connected equipment running without interruption or data loss during power failures. Automatic voltage regulation (AVR) power conditioning maintains smooth, continuous operation of connected equipment during brownouts and overvoltages. Surge-only outlets offer convenient protection for printers and other desktop accessories not requiring battery support. AC and dataline surge suppression prevents connected equipment damage. USB communications port supports built-in power management and auto-shutdown features of Windows and Mac OS X or full featured monitoring and data-saving auto-shutdown options using Tripp Lite's free PowerAlert monitoring software.