The Professional Tower Series UPS provides advanced level of power protection to servers, telecom equipment, VOIP, Internet working hardware and other mission-critical applications. Featuring Pure Sinewave output and Automatic Voltage Regulation (AVR) stabilizing the AC signal and maintaining a safe voltage, it allows the UPS to maintain safe power levels for the connected equipment without resorting to battery power. The multifunction LCD readout provides immediate access to precise information of critical power/battery condition and to help users control and manage the machine easily.