Maintain productivity when the power goes out. All seven outlets provide surge, lightning and circuit-overload protection for attached devices, in addition to five providing battery-operated backup power as soon as electrical service is interrupted. USB port provides charging convenience. Three wide-spaced outlets permit the use of transformer-based plugs. Audible alarms notify you of changing utility power and UPS conditions. The LED status display indicates On Line, On Battery and Building Wiring Fault conditions.