CyberPower CP1500PFCRM1U PFC Sinewave UPS Battery Backup and Surge Protector, 1500VA/900W, 6 Outlets, AVR, 1U Rackmount; UL Certified

This is a legit UPS, that works as advertised. It also has a wealth of settable parameters, that allow you to tune its operation to your environment. Seems nicely made and fit nicely into my rack to protect my Ubiquiti gear. If that's not enough, there's an optional network card that you can use to monitor it remotely, and that'll send you email or a text of there's a power outage. Even better, there's an optional environmental sensor module that you can plug in that'll report the temp and the state of up to 3 open/closed sensors. These options are spendy, but you can find them at reasonable prices on eBay.

This unit is perfect for small network rack

Bought this for a network rack and it is everything I expected and more. It is a 1U high unit, but fairly shallow depth so allows space for plugs and wiring behind it. I haven't figured out how the specs work as they say it will cover something like 5-10 minutes, but with the whole stack plugged in, it tells me it will last 58 minutes on battery which is far more than I expected and more than enough time to cover most outages or allow for an orderly shutdown. I like the LCD panel to show the various stats and modes. It is very quiet -- much quieter than the fans in the rack by an order of magnitude.

Works as intended, good price!

I wish this wasn’t so expensive compared to the 2U, but it’s nice to save space and it also has non-backup outlets to protect devices either higher power draw.