The SMART1500LCDXL SmartPro LCD 120 V, 1500 VA/900 W 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 ms to keep your connected equipment running long enough to save files and shut down safely with no data loss. Eight NEMA 5-15R outlets protect against surges, as well as provide up to 12 min of UPS battery support at half load (450 W) and 4 min of support at full load (900 W). You can get even more runtime by connecting an optional BP24V15RT2U external battery pack. Automatic voltage regulation (AVR) corrects severe undervoltages as low as 75 V and overvoltage's as high as 147 V without using any battery power. EMI/RFI noise filtering improves your equipments performance and prevents damage. A 1038-J surge suppression rating protects your equipment from harmful power surges. Space saving NEMA 5-15P right angle plug with 6 ft cord connects to any NEMA 5-15R socket. Large rotatable LCD screen shows real time input voltage, load, AVR, remaining battery runtime and battery statuses at a glance. With Tripp Lite PowerAlert software (available via free download), the SMART1500LCDXL enables safe unattended system shutdown and file saves in case of a prolonged power failure.