. The APC Back-UPS RS 550VA UPS is an ideal way to protect your IT system. It is designed to protect your equipment from power surges on data lines & can be managed via the included USB (Universal Serial Bus) cable. It features six output connectors & provides temporary battery power when the utility power is out. The UPS provides surge-only protection for non-critical equipment while reserving power capacity & run time for equipment requiring battery backup. Surge-only outlets are ideal for scanners & printers enabling the UPS to provide maximised power for important devices such as PCs & monitors. The power supply features a resettable push-button circuit breaker for easy recovery from overloads or short circuits. It automatically cuts power to idle equipment in order to conserve electricity while the unattended shutdown feature ensures the operating system is properly shut down in the event of a power outage. Automatic self-testing allows for early detection of a battery that needs to be replaced as well as any problems with internal components. The batteries are user-replaceable with no tools required & are also hot-swappable so you can replace them without powering down your equipment. Battery life is maximised through a range of different features including intelligent precision charging & adjustable voltage transfer points. The uninterruptible power supply offers a range of user-friendly features such as audible alarms to alert you to changes to UPS or utility power conditions. The LCD graphics display provides text & diagrams which display modes of operation system parameters & alarms. Users are warned when a battery is not available to provide backup power & notifications are also provided for early warning fault analysis. The UPS comes with a software CD USB (Universal Serial Bus) cable & a user manual. It is safety-agency approved & offers reliable & powerful performance when you need it most..