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Tripp Lite's SMART550USBWD provides unattended systems (including kiosks, web/email servers, security system computers and more) with a single-purchase solution for 100% availability, including a UPS System and WatchDog Service Monitoring/Reboot Software. The line-interactive UPS System offers voltage regulation, surge suppression and long lasting battery support. Internal UPS circuits support systems for up to 30 minutes during power failures. Automatic Voltage Regulation (AVR) circuits regulate brownouts as low as 89 volts back to normal 120V levels without using battery power. Includes 3 battery supported outlets plus 3 additional surge suppression-only outlets. USB port works with PowerAlert Software (included) to enable optional unattended system shutdown. Built-in single line RJ11 phone suppression jacks. 550VA/300 watt power handling ability. Offers 4 minutes battery runtime with a full load of 550VA/300 watts and 15 minutes with a half load of 275VA/150 watts.