CO2 Carbon Dioxide Air Quality Monitor, Pollution & Ventilation Meter, Tester; Detect & Test Indoor Air Ventilation Levels with CO2 PPM Levels, Temperature and Humidity Sensor Readings on LED Screen

There was nothing I disliked about this....Once calibrated, it showed me that I had a big problem with my air quality due to VOCs from an item I had purchased .. I removed the item..I removed the problem...not confused, headache gone, coordination back to normal, asthma clear...if in any doubt as to what you're breathing is safe...GET ONE...I was a novice in these matters...this cleared my mind and also my breathing.. EXCELLENT

I have never bought or used a product like this before, so this review is only relevant to this being my first air quality monitor.Having said that I have no reason to 'disbelieve' the data it's presenting to me.I bought this after being hospitalised due to a rare bacterial infection which, possibly coincidentally, occurred after I had removed some tiles in my bathroom after spotting a leaking toilet seal.For peace of mind, once I had returned home, I thought I'd buy an air quality tester to see the state of the air quality in my flat.I'd already covered the open tile area with pvc sheeting. The air quality in various rooms, including the bathroom area, was of good quality. I placed this monitor inside the pvc sheeting (and re-sealed it) to see what it said about the air there (that had been open prior to my hospitalisation). It came up as 'unsatisfactory' - which may have been the cause of my illness.I would say this gives you peace of mind if you suspect the air in a room is not of acceptable quality, or gives you the evidence to take corrective steps.After replacing the tiles and re-grouting the bathroom that had the missing section, the air quality is reading 'good' again.I would recommend this to give an indication if something may need further investigation.

I bought both types to compare readings from this supplier and the reading for VOC is ready 4 x more on this one then the other! So something isnt right. Im going to buy another identical to the other one to compare the 2 against the original....will update.And PM10 & PM2.5 never differ from each other which seems odd.

Easy to read easey but long set up .bought this to take Mobil readings other than move the two air purifiers around .it showed good clean air yet both air filters that ar pp5 and hep showed bad air .you could also smell the air was bad with formaldehyde.no good for what I wanted .poor readings

OK, no good if you want to use it over a long period. The fully charged battery died after 2 hours. May have been a dud one!

It does what it says. Has no comparison so don’t know if it is accurate or not, but it seems like so since the reading is different if placed in different rooms.