Apc Back-ups Ns 8 Outlet 575va, 120v Early-warning fault analysis on batteries enabling timely preventive maintenance 3-stage regulated charging ensures the fastest recharge times without decreasing battery life Easy recovery from overloads; no need to replace a fuse Output Output Power Capacity: 345 Watts Battery and Building Wiring Fault Audible Alarm: Alarm when on battery : distinctive low battery alarm : overload continuous tone alarm