You will want some kind of screen to block the UV light from shining in windows and doors… these work quite well - you’ll also want a trash can handy to catch the crunchy leftovers.
Are these battery powered or is there a plug?
Kinda wished this uses a DC power adapter that’s capable of 120v~240v for overseas use. I would buy a couple of these but it’s not
Received my order of a couple of these zappers and just set it up alongside my plant while doing a sinister chuckle. Hours later wondered my I haven’t heard any zaps and pops of critter death, well to my amazement when I was looking at the zapper I saw 2 flies and some fruit flies having a disco around the blue light. The damn zapper isn’t working…lol 
So instead of a bug zapper it’s a bug attractor 
Please reach out to Woot! Customer Service. To speed things up, let them know if you prefer a return/refund or a replacement (if possible).
Please allow 24-48h for them to respond.
Browser: Use the Woot! Customer Service form.
Woot! App: Choose Account from the bottom navigation and then Support.
Self-Return: Items without Li-Ion batteries can be self-returned within 30 days. Go to your Order Details to get started. The return label will be emailed from UPS.
Note: Woot! Customer Service replies go to the email address on your Woot! account, not your Amazon login email if used/different.
(Please Note: I’m not employed by Woot, but I volunteer to help in the forums.).