Temtop Air Quality Monitor PM2.5 Bluetooth Thermo-Hygrometer Digital Hygrometer Indoor Humidity Gauge for Home Office Humidity monitor for Bedroom, Livingroom S1+

I use this air quality monitor daily in my bedroom to check for the quality of air. I bought a pair of these devices, a slightly different one, and I like them. The engineering is good, they are robust and they're very easy to charge up as usb-c devices. In this area there are a lot of expensive devices with questionable capacities that these are good and as far as I can tell accurate

My son has quite bad asthma and this helps me keep control over the air quality in his room at night.

Does exactly what I wanted. Fab instruction, clear uncluttered display and very sensitive.

Once re-calibrated, works well. Phone app is quite good. Reccomended.

Temperature display was out by 4-5 degrees centigrade. I had a feeling it wasn’t accurate so I tested it against two normal room thermometers to confirm. That undermined my confidence in the accuracy of the pm2.5 readings which is why I bought it so I’m sending it back