CyberPower Standby CP550SLG 550 VA Desktop UPS safeguards home/office computers and other electronics (monitors, scanners, speakers, CD/DVD players, MP3 players and phones) from surges, spikes, sags, brownouts and other power abnormalities. Its composite integrated circuitry offers advanced lightning protection. More from the Manufacturer
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It was easy to set-up and works well. You do not have to connect battery wires as with some other brands. It performed exactly as it should every time I tested it. Note: although the battery came partially charged, you should charge it up fully per the instructions for maximum performance. The only negative is that it beeps every 30 seconds when the household power goes out and it is running on battery power. You can disable this using the included Windows software, but it will remain disabled only as long as the USB cable (also included) is connected to a computer. In my case, I don't want the UPS connected to a computer. I temporarily connected it to a computer and used the software to turn off the beeps, but as soon as I disconnected the computer, the annoying beeps were back. Too bad, otherwise rating would be 5 stars.