Use Suggestions
1. When the CO2 display remains unchanged at 400ppm, it means that the actual CO2 reading at this time is lower than 400ppm.
2. After the CO2 alarm function is turned on, an alarm will be issued every time the CO2 concentration increases. This function can be turned off by setting the function key.
3. Because the air is flowing, the CO2 reading will change at any time, but the reading will remain within a certain range, which is the current CO2 concentration in the air.
4. There is a protective film on the screen, which can be torn off.
Important information:
1. Click the seller name "KOPUO", and then click "Ask a question" on the right side of the page.
2. Log in to your Amazon account> select "Your Order", search for the order number> click "Contact Seller".