Installed Cyberpower on my brand new computer with a brand new printer only 2 months old. Noticed a warning printer light started to glow a few days after the UPS connection. A printer tech support said firmly that meant printer hardware failure. Soon after my printer stopped working. The Cyberpower was the only thing that I installed. Nothing else was changed or modified. I had to replace my spanking brand new printer. Cyberpower won't replace your printer. Read their policy. It's a nightmare.I replaced this Cyberpower with another Cyberpower rated at 1000VA and over a short period of time my monitor began to make a very loud hum. That one was sent back immediately also. Note, all my computer "stuff" is brand new.Bottom line; if you value your "stuff" be careful about installing Cyberpower VA850. It's made in China. It is also advertised with Green power but this VA850 did not have the official "Green" sticker on it or the logo on the box.