Size: 1000VA/750WA rackmount UPS with line interactive topology, the Smart App Sinewave PR1000LCDRM1U provides battery backup, power protection (using sine wave output), and surge protection for corporate servers, department servers, storage appliances, network devices, and telecom installations requiring Active PFC power source compatibility. The PR1000LCDRM1U uses Automatic Voltage Regulation (AVR) to correct minor power fluctuations without switching to battery power, which extends battery life. AVR is essential in areas where power fluctuations occur frequently. The PR1000LCDRM1U comes with a three-year warranty and a $400, 000 Connected Equipment Guarantee.