The SMART1000LCDU SmartPro LCD 120V 1000VA 500W Line-Interactive Desktop UPS 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 home theater components and desktop computer system, the SMART1000LCDU 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, 10 minutes of support at half load (250W) and three minutes of support at full load (500W). ENERGY STAR certification helps you save money and energy and protect the environment by meeting strict efficiency guidelines set by the U.S. Environmental Protection Agency. Automatic voltage regulation (AVR) maintains 120V nominal output over an input range of 89V to 139V without using 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. With Tripp Lite's free PowerAlert® software (available via web download), the SMART1000LCDU enables safe unattended system shutdown and file saves in case of a prolonged power failure.