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It's not reliable. It passes in seconds of measuring 450ppm to over 2000. You reinstate it and return to its initial value. Battery barely lasts day and a half
Thank you to the SundaysDeal Store Ordered on January 13 and delivered on January 22 Very very fast Works very well
Bullshit... the parcel went 3 months, the testimony is clearly not adequate. Then the scale is up to 5000, then the understated... Throw out the money.
It works very well and is very visual. At Christmas meals it helped us a lot to control the correct ventilation of the stay. Highly recommended
I have compared the readings in this article with a CO2 meter of contrasting quality and the article does not make accurate measurements of the CO 2 concentration level.