200 to 490 Watt. Listed to UL 924 by ETL. Pure Sine Wave Output preferred for LED Lighting Loads. Automatic monthly and annual self testing. Compact 24" wide x 17" high x 9.5" deep, space-saving enclosure with front access. Double Conversion, "no-break" online system for all applications and lamp types. Bright function indicators for rapid identification of system status. 1 Year Warranty.