Tripp Lite's SUINT3000RTXL3U UPS System offers complete power conditioning & battery support for critical fileservers & internetworking equipment in a versatile 3U rack/tower configuration. Offers compatibility with 200/208/220/230/240V applications at 50/60 Hz. Double conversion power conditioning process removes line noise, voltage fluctuations & frequency variations by converting incoming AC to DC, then back to universally compatible pure sine wave AC output. Standard internal batteries offer seamless support of connected equipment during power failures with zero transfer time. Support through extended power failures is available with the addition of 2U rack/tower compatible battery packs BP72V15-2U (limit 1), BP72V28RT-3U (multi-pack compatible) & BP72V18-2US (multi-pack compatible). Maintains continuous output over an input range of 160 to 275V without depleting battery reserves. True online, double-conversion power conditioning offers enhanced, network-grade pure sine wave AC power for critical fileservers, internetworking equipment & sensitive electronics Maintains output within 2% of selectable 200/208/220/230/240V at 50/60 Hz (+/-0.05 Hz) Neutralizes frequency variations, fast electrical impulses, harmonics & other hard-to-solve power problems not addressed by other UPS types Versatile rack/tower format requires only 3 rack spaces (3U) in rackmount applications; included tower stand set supports upright configuration