550VA energy-saving standby 120V UPS with USB port. Protects from blackouts, brownouts and transient surges. Supports green energy savings via built-in eco outlets that automatically power off unused computer accessories like printers or multi-media speakers when the computer is not in use. Full load efficiency rating of 99% also offers energy-savings and cooler operation by limiting UPS power consumption to less than 3W. Eco-friendly design meets strict RoHS environment standards. Provides uninterrupted transition to battery-derived AC output during brownouts and power failures with enough runtime to save and shutdown connected equipment without data loss. Offers complete protection in an ultra-compact desktop or wall-mountable housing. Includes 4 battery supported outlets for computer, monitor and one vital system peripheral, plus 4 additional surge suppression-only outlets for accessories not requiring battery support.