Tripp Lite OMNI500ISO 500VA 300W UPS Battery Back Up Tower Isolation Transformer 120V, 3 Outlets 500VA/300W tower 120V line interactive UPS with isolation transformer NEMA 5-15P input plug and 3 5-15R outlets USB port, Normal & common mode EMI/RFI line noise immunity Automatic voltage regulation (AVR) automatically corrects incoming voltage to keep equipment working through low voltage (brownouts) as low as 83V, without draining battery power 5 min. full-load runtime (300W); 14 min. half load runtime (150W)