Title text:
With a good battery, the device can easily last for 5 or 10 years, although the walls probably won't.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3100/
this post was submitted on 09 Jun 2025
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They also had one that made creepy sounds. I had one set to a child laughing in the air vents in a creepy hallway with flickering lights in an old church building.
It was awesome.
Pretty sure I have one of these kicking around somewhere