Keep PCs, workstations and home entertainment systems operational for up to 90 minutes during blackouts. Automatic voltage regulation (AVR) corrects brownouts back to safe 120V power without draining the UPS battery. Surge suppression and EMI/RFI line noise filtering prevent hardware damage and poor audio and video performance. A large, illuminated LCD screen shows incoming power conditions and UPS operations in real time. Dataline surge protection. USB ports work with free unattended shutdown software, so your files are saved in the case of a blackout—even when you are not there.