ALLmeter CO2-melder luchtkwaliteit meetinstrument 2-in-1 wit oplaadbare CO2-meter met LCD voor thuis, kantoor, reizen, camping

The device seems to take a while to produce a result. It first has a 2 minute timer (which is fine) but once it starts providing results they always start very high and start dropping and it takes a white before it settles down. This makes it hard to use practically as you aren't confident of the results it presents you.I like the concept of the device, something you can add to your bag, and turn on when you want a reading but hard to use in practice as everytime I use it as the initial values it provides is very different to later values.