BATTERY BACK-IP "Continue Internal Communications During Power Failures!(Use with V-2001A, V-2003A, V-2003AHF, V-2006A, V-2006AHF page controls.)Contains Long Life Maintenance-Free Gel Cell Batteries, Fuse-Protected AC Input, Current Limiting On Output, Connects Directly to Battery Back-Up Molex Connector On Compatible Equipment 12 And 24 Volts DC, Fused At 3 Amps, Battery Test Switch And Power On LED, UL Listed, Specifications: DC Output: 12 and 24 Vdc Outputs, 3A; Power Requirements: 120 Vac, 60 Hz, 127 W; Shipping Weight: 20 lbs (9.1kg); Dimensions: 9.25:"" H x 7.5"" W x 5.15"" D(23.5 cm x 19.0 cm x 13.08 cm)"