The Back-UPS ES offers our best 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. Most models include our award-winning 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.