The Back-UPS ES offers serious value for protecting your home and home office computer systems. Completely redesigned to use less power during normal operation, the Back-UPS ES provides enough backup power for you to work through short- and medium-length power outages. It also safeguards your equipment from damaging surges and spikes that travel along your utility and data lines. Includes APC's award-winning PowerChute software, which automatically saves open files and gracefully shuts down your computer during extended outages. Additional features like an audible alarm, LED status indicator, user replaceable battery, push-button circuit breaker and transformer-block spaced outlets make the Back-UPS ES the perfect unit to protect your productivity from the constant threat of power outages and lost data.