OptiPlex 3060 Micro, UPS suggestion?

Make sure the UPS is sine wave.  In another post, a Dell user was having problems or his computer didn't work all together on a UPS that wasn't sine wave.  I've powered computers myself with sine wave.  Also, with your 3060 Micro being new, Dell Support can be contacted directly, starting with the "Contact Support" link below this post.  By chat or calling, you'll have an answer right away, and there's also email.

On Amazon, even if it takes much scrolling, runtime should always be in the description (screengrabs).  (Please pardon incidental duplicate screengrab - I couldn't delete.)

I'm sure Dell Support has recommendations.  Outside of that, one would have to ask about any certain UPS's, that don't specify sine wave, before buying.  It helps to add "sine wave" in the search bar.

This model didn't specify sine wave, but specified runtime..This model didn't specify sine wave, but specified runtime.

I would just get the best one you can afford, and make sure you get one with a long enough Power Cord.  My cheapo has a short Five Foot cord, and you aren't supposed to use an extension cord.  Some of the more expensive type have 6ft cords.  And some of the cheapos are not "sine wave" like Brad mentioned.

The 7 Best Uninterrupted Power Supplies (UPS) to Buy in 2019

The 2nd UPS on the list from the link above has simulated sine wave and specifies making sure your equipment doesn't require true sine wave (screengrabs).  Another thing to watch for.  Some UPS's on that list do have true sine wave.

In my post 2 places above, I edited the 2nd sentence.

From my point of view the OptiPlex 3060 has a 280watt bronze PSU, so any sine wave good branded UPS would do the required job just fine, just like @bradthetechnut mentioned, your pc is new you can always contact the dell support to get the best suggestion from their professionals. Also, If you're looking for a beefier UPS then go for the APC sinewave BR1350MS it can provide 12 min Half load and 3.5 min on Full load it also has a 
1350VA 810W output. I found these details on this link got it from a quick google search https://appuals.com/the-5-best-uninterruptible-power-supplies/ they also have reviewed more of the UPS's you're looking for check them out and let us know which one you got! Good luck.

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@aniruddhan wrote:

OptiPlex 3060 Micro

so i've been looking to order a UPS 

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I only buy APC these days:

This one is nice because it's large enough to handle all machines in your whole system. Also, it has AVR which not all the cheaper ones do. Obviously, the LCD and reports are nice.

Now, you even get "Pure Sine-Wave" support in this APC "SMB/pro-consumer" line. However, in 20 years, I've never seen any machine fail to run on any-old (normal sine-wave) APC unit over the years.

APC Sine Wave UPS Battery Backup & Surge Protector, 1000VA, APC Back-UPS Pro (BR1000MS)

If true, or pure sine wave isn't needed, both units pictured above look like a good deal.  They're not standard cheapies.  And there's the links with suggestions too.

I found the post I was thinking of and referred to earlier:  Optiplex 3050 SFF Crashes On UPS