Tripp Lite's INTERNETOFFICE 500 standby UPS system offers surge suppression and long lasting battery support for personal computers, internetworking equipment and other sensitive electronics. Internal UPS circuits support entry level PC systems for up to 30 minutes during power failures and brownouts so that connected equipment can be shutdown without data loss. Offers complete desktop power protection in an attractive gray tower configuration. Includes 3 battery supported outlets for computer, monitor and one vital system peripheral, plus 3 additional surge suppression-only outlets for printers and other system accessories not requiring battery support. USB port enables optional unattended system shutdown without data loss in the case of extended power failure, cable included. PowerAlert software available via free download from www.tripplite.com. Built-in two line phone suppression protects modem, fax machine, cordless phone or other peripheral with a standard one or two line dialup/DSL phone connection. Built-in audible alarm and 3 front panel LEDs indicate line power status, battery power status and battery low/replace status. 500VA / 280 watt power handling ability supports entry-level PCs, network workstations, point-of-sale equipment, small business phone systems, audio/video equipment and home theater systems. Offers 5 minutes battery runtime with a full load of 500VA and 17 minutes with a half load of 250VA. Supports hot swap battery replacement via built-in access panel.