https://www.amazon.com/Zapper-Electric-Indoor-Insect-Mosquito/dp/B01N5TCXWMI took two of the single pack deals with the extra tubes. The tubes cost at least $11 on their own. I have had an Aspetek zapper for years, looks the same, and gets rid of bugs in the kitchen brilliantly.
Then cancelled the two singles and ordered the twin pack with 4 extra tubes that popped up. Will return the singles if they don't cancel.
Little flies come in with fruit and veggie. Put a bit of fruit in front of the zapper and you will hear the cracking noise as they zap themselves.
Got two more for the basement. Will put one in the Succa under a covered corner.
Good Shabbos!