Question for all my people who work with electronics. Regarding Sine Waves and stuff like that.

I'm going to be purchasing a UPS just because I have a nas and a gaming PC along with a monitor and a bluetooth speaker soundbar. Would it make any sense to buy a UPS that advertises "Sine Wave" right in its name? Like is it even worth buying?

These are the two I've considered:

1. https://www.amazon.ca/gp/product/B00429N19W/ref=ox_sc_act_title_1?smid=A3DWYIK6Y9EEQB&psc=1
Which has the Sine Wave protection thing. Obviously if I don't need it, I don't need it.

and

2. https://www.amazon.ca/CyberPower-CP1500AVRLCD-Intelligent-Outlets-Mini-Tower/dp/B000FBK3QK/ref=sr_1_3?ie=UTF8&qid=1535587845&sr=8-3&keywords=UPS&dpID=41ZpxIiuVVL&preST=_SY300_QL70_&dpSrc=srch

This one doesn't have the Sine Wave thing, but it has what I need, which is just the battery backup, and enough plugs in the rear for whatever I need. Any thoughts?