Tripp Lite SmartOnline 120V 3kVA 2.7kW On-Line Double-Conversion UPS, 2U Rack/Tower, Extended Run, Network Card Option, ENERGY STAR (SU3000RTXL2U) Protects connected mission-critical equipment against damage, downtime and data loss due to blackouts, brownouts, surges and line noise. Converts incoming AC power to filtered DC power, then back to AC with a pure sine wave. Zero transfer time between AC power and battery operation; +/-2% output voltage regulation in online and battery modes 13.8 min. runtime at half load; 4.8 min. at full load; Expandable runtime with optional external battery packs Optional WEBCARDLX network interface for full remote access 2-year limited warranty; $250,000 Ultimate Lifetime Insurance