APC Smart-UPS 1000VA USB & Serial RM 1U 120V. Description: APC Smart-UPS, 1000VA/640W, Input 120V/Output 120V, Interface Port DB-9 RS-232, SmartSlot, USB, Rack Height 1 U. Includes: CD with software, Rack Mounting support rails, Smart UPS signalling RS-232 cable, USB cable, User Manual. Topology: Line Interactive.