The black Smart-UPS 3000VA LCD 2U Rackmount with 12' Cord from APC provides power to your important computer components in the event of an electrical outage. With sine wave output it eliminates humming and heat generated, when powering tube lights and fans. The UPS's Boost and Trim Automatic Voltage Regulation (AVR) feature eliminates voltage fluctuations preventing AV signal degradation. Its LED indicators provide easy to read status of the unit and utility power conditions. With a predictive replace battery date, this UPS provides the month and year when battery replacement is recommended to aide in long term maintenance planning. Its USB connectivity provides management of the UPS via a USB port.