Power failures result in keyboard lockup, complete data loss, hardware degradation and damaged motherboards. The Back-UPS CS 500 from APC allows you to work through brief power failures or to shut down your system in the event of an extended failure. With six NEMA 5-15R power outlets, the UPS protects your computer from electrical noise, spikes and damaging power surges, even lightning. It features three audible alarms including alarm when the battery is on, distinctive low-battery alarm and overload continuous tone alarm. Status indicator LEDs notify you of changing UPS and utility power conditions. The UPS includes additional surge-only outlets that offer protection for non-data sensitive equipment like scanners and printers without reducing the unit's available power or battery capacity. This helps increase battery power for equipment like a computer and monitor.