Air Quality Monitor Biaoling Accurate Tester for Co2 Formaldehyde(hcho) TVOC Pm2 for sale online | eBay

Unrealistic and inaccurte readings

Don’t waste your money. Inaccurate readings make this totally useless. PM2.5 and 10 readings have never changed. The readings are always 3 and 5 respectively. These are the same numbers day after day, inside in different rooms or outside and in my car. The CO2 always registers unsafe levels. There is no change when used in the kitchen while cooking or any other room in the house. The same unsafe levels are recorded outside and in my car too.

The calibration function has no effect. There is no continuous monitoring ability. The internal battery doesn’t last very long. There is no a/c operation or screen saver feature.

Verified purchase: Yes | Condition: New