Backup Power Supply APC Back-UPS BX 500:Simple to use backup power brand APC providing uninterrupted and absolutely correct power critical electronic components.This easy-to-use APC UPS provides a reliable and consistent power supply for critically important electronics. The power source is equipped with Automatic Voltage Regulation technology, which eliminates the voltage fluctuations without discharging the battery in the mains. This preserves battery life and maximizes its runtime. A total of 3 devices can be connected via IEC320 C13 slots. In addition to the battery backup, device features a surge prorection as well. Automatic diagnostic test ensures that your replacement power supply is always ready whenever it is needed.