FEATURES: Power Factor Corrected, Wide InputRange The Rugged-AC accepts a wide range of voltage and frequency inputs while providing seamless active power-factor correction and clean, reliable AC power. On-line This true on-line, double conversion uninterruptible power supply continually creates a pure sine wave AC output from a DC bus, thus protecting sensitive equipment from surges, spikes, brownouts, blackouts, and noise. Dual Input, Automatic Power Selection Our innovative design allows the UPS to automatically select AC or DC power input. In the event of an AC power failure the external DC inputtakes over.