UPS is a device that allows a computer to keep running for at least a short time when the primary power source is lost. ACP UPS also provides protection from power surges. APC UPS SUA750I Boost and Trim Automatic Voltage Regulation (AVR) Gives higher application availability by correcting low and high voltage conditions without using the battery. APC SUA750I UPS’s Intelligent battery management Maximizes battery performance, life, and reliability through intelligent, precision charging. APC UPS SUA750I Power conditioning Protects connected loads from surges, spikes, lightning, and other power disturbances. With IT Shoppe you get fully featured, professional-grade UPS that are easy to install and simple to use. For more details click on http://www.itshoppe.co.in/apc-ups-sua750i.html