This PSI5 uninterruptible power supply (UPS) is designed to protect and extend the life of your electronic devices in school, home and office. This 1500VA UPS offers cost-effective protection from downtime and damage caused by power outages, brownouts, sags, surges or noise interference. Automatic Voltage Regulation (AVR) extends battery life. Voltage regulation is from 83 to 159 VAC without using the battery.