Tripp Lite 5000VA SmartOnline UPS, Double-Conversion, 208/240 & 120V, 4U Rack/Tower, Extended Run, Network Card Options, USB, DB9, Bypass Switch (SU5000RT4U) 5000Va/5kVA/3800 watt Uninterruptible power supply (ups) with dual voltage output of 208/120 or 240/120V True on-line, double-conversion for pure, full-time sine wave AC output free of surges, voltage fluctuations and line noise 4U Rack-mount format or use the optional 2-9ustand for tower; hot-swappable power and battery modules USB, RS232 & EPO ports, slot for network management card options and expandable runtime with optional external battery packs 2-year limited warranty; $250,000 ultimate lifetime Insurance