OPTI ES1500C-RM Line-Interactive 1400VA 8AC outlet(s) Black uninterruptible power supply (UPS)

1400VA/980W, 12V/34W x 2, RS232, RJ11, RJ45, 1050J, 4 hours * AVR (automatic voltage regulator)
* 8 battery backup outlets
* RJ11/RJ45 protection
* 2U design
* Easy battery replacement procedure
* 1050 Joules energy rating
* 4 hours battery recharge time

ESC-RM series offer the highest power capacity and the best equipment protection around. Not only do they protect against blackouts, sags and surges, but with the added feature of AVR (Automatic Voltage Regulator), these UPS products also ensure that only clean and safe currents reach your equipment.
What is AVR?
AVR is the feature that corrects under and over voltages without draining the battery, thus providing extended battery life and most important, allowing the UPS to provide high quality power during unacceptable voltage fluctuations