Advanced air purification technology: HEPA-13 and activated carbon work together to easier to breathe. Purify household air: The filtration area is up to 615 square feet or 126 square feet per hour, and pollen, tobacco, smoke and dust are filtered according to AHAM certified delivery rate. Reduce odor: Activated carbon filter layer helps to reduce unpleasant odor. Prolonging filter life: The 3-in-1 filter can last for at least 8 months in 24/7 ecological mode. Filter Replacement Indicator: Our air purifier measures the exact usage of your filters and lets you know when you need to replace them for the best results. USED for Instant Ap100 F1003 Color: As Shown Material: filter cotton Package Contents: 3 x F100 H13 Premium True HEPA Replacement Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.