The SMART1000LCD SmartPro LCD 120V 1000VA/500W Line-Interactive Uninterruptible Power Supply provides battery backup and AC power protection against blackouts, brownouts, power surges and line noise that can damage electronics or destroy data. Ideal for backing up your desktop computer or audio/visual components, this line-interactive UPS switches to battery backup mode in milliseconds to keep your connected equipment running long enough to save files and shut down safely with no data loss. While all eight NEMA 5-15R outlets protect against surges, four outlets also provide up to three hours of UPS battery support for a DVR component, 60 minutes of support for a basic desktop PC and LCD monitor, and 10 minutes of support at half load (250W). Automatic voltage regulation (AVR) corrects undervoltages as low as 89V without using any battery power. EMI/RFI noise filtering improves your equipment's performance and prevents damage. A 1038-joule surge suppression rating protects your equipment from harmful power surges. Space-saving NEMA 5-15P plug with six' (1.8m) cord connects to any NEMA 5-15R socket and allows furniture to be placed flush against the wall. Large rotatable LCD screen with dimmer shows real-time input voltage, overload, AVR and battery statuses at a glance. With free PowerAlert software (available via free web download), the SMART1000LCD enables safe unattended system shutdown in case of a prolonged power failure.