Filter Replacement:（There is a Filter replacement button on the operator panel, please operate here.）Usage period grid lefts one and ﬂashes, please replace new ﬁlters and press and hold the ﬁlter replacement button for more than 3s to reset the usage period of ﬁlter. Usage period grids reﬁlled. When the usage period oﬀ ﬁlter is more than 10%, it cannot be reset. Forced to reset - If reset is required, press "Auto" and "Sleep" for more than 5 in standby state, there is "tinkle" sound, and LED ﬂashes for six times, it is resettled. Applicable models: inofia 1539 air purifier ASIN:B07LB15VBT. Package Content:Composite filter X 2（Air purifier is not included）. Note:The inofia 1539 air purifier has two filters that work on both the left and right sides. When replacing the filter, you need to replace the two new filters at the same time, otherwise the effect will be greatly reduced.
- <b>100% matching for models :</b> Inofia 1539 true HEPA air purifier ASIN：B07LB15VBT.
- <b>Easy to replace :</b> Remove the old filter before starting the purifier, then replace the new filter, and then reset to continue the purifier.
- <b>HEPA filter :</b> The ultra-thick pleat design greatly increases the contact area between the filter and the contaminant, which not only improves the purification speed, but also makes the dust holding capacity larger and the service life longer.
- <b>Material : </b>The use of a scientifically formulated special activated carbon can further purify the air and have a good effect on the freshness of the air. Compared with ordinary activated carbon, the adsorption effect is better and the use time is longer.
- <b>Note : </b>To ensure good sealing and reduce the effects of filtration, the product is sealed after packaging. Before replacing, remove the filter plastic bag and then replace the filter. In addition, the filter life must be reset after replacing the filter (see product description for specific operation). It is recommended to replace the filter every 3 to 6 months.