I've got a Qingping Air Monitor Lite - it's small, not ugly, and from what I read at the time, has a decent CO2 sensor. It integrates perfectly with Home Assistant via Bluetooth. Seriously, no issues once I got it setup - which I believe did require their app to do initial setup/updates/etc... https://www.home-assistant.io/integrations/qingping/ https://www.amazon.ca/Qingping-Monitor-Compatible-Temperature-Humidity/dp/B092HK4BB1

The 32x was always super fascinating to me as a Nintendo kid....so much so, that I also bought one recently! It's just a wild idea from a different era.

Never knew anyone with one, but I always wanted one when I was a kid. Magazine coverage made them look awesome. Now I'm old and still want one! But it seems they're a bit high maintenance...