The ST425 Standby UPS from CyberPower provides you with battery backup power and surge protection to ensure your devices stay operational in critical situations. It's equipped with eight NEMA 5-15R outlets, some of which are spaced to better fit larger plugs. The eight outlets deliver a surge rating of 890 joules, and four of these outlets are powered by an internal battery that grants connected equipment a full-load runtime of up to 1.5 minutes in the event of a power failure. Other notable features include onboard LED indicators and audible alarms to alert you when a situation does occur. In addition, the UPS comes with EMI/RFI filtration.