Products with this certification label meet current industry safety standards. This type of surge protector requires installation by a professional electrician. A UPS is designed to immediately switch your computer to emergency back-up power and allow you to work through brief power outages without data loss or downtime. A UPS also provides protection from voltage sags.
Sags are a short-term decrease in the voltage level.
They can cause frozen keyboards and unexpected system crashes. A UPS can give you time to save your files and shut down the computer safely in the event of an extended outage. Some UPS's come with software that automatically saves and shuts down your equipment. Your computer's monitor size and the type of CPU will affect the UPS's battery run-time. A UL 1778 rating.