unpack the product and remove any packing tape or protective vinyl before using the product.
Pull out the product from the packaging and remove the fi xing tape attached on the product.
Grab the top end of the back cover and gently pull it.
You will see "PM 1.0 & GAS SENSOR SYSTEM" on the back cover of the product.
Remove the cover from the product.
Remove the support located at the filter inlet.
Remove the filter and its protective vinyl.
Install the filter in the product.
Make sure that the handle faces upward.
Insert the fixing parts at the bottom of the cover into the holes at the bottom of the product before you close the cover.
Failure to remove the support may affect the performance of the product. Please be sure to remove it before use.
Make sure that you remove the filter's protective vinyl prior to use otherwise it may result in product malfunction.
Pay attention to the direction of the filter when you install the filter otherwise it may cause malfunction or failure of the product.