The Back-UPS BX1100LI-MS from APC by Schneider Electric protect your computer and electronic equipment from damaging power outages, surges and spikes while providing short term battery power during an outage. The Back-UPS models feature Automatic Voltage Regulation (AVR), which instantly adjusts high and low voltages to safe levels for your electronics, so you can work indefinitely through sustained power fluctuations. Equipped with Universal sockets, the 800 and 1100 keep your desktop computer, monitor or other critical devices (router, modem, television, etc.) running when the power goes out. Specifically designed to protect electronic equipment in harsh power environments, the Back-UPS 800 and 1100 ensure maximum productivity and work efficiency.