it's Tiny
Pictured with a bic pen for reference, this is much smaller than what I expected.  It doesn't plug into the wall, it charges with a USB cord and I couldn't tell if it was even working at first, but now that it's been plugged in for 20 minutes or so, I can hear a light humming noise.  Appears to have a replacement filter. I was able to pull the top black vent out, but not sure how to get underneath the next part.  I think next time I'll just pay more money to get a bigger one.
Rating: 2 stars