?Compatibility?Our filters is perfectly compatible with InvisiClean Claro IC-4524 Air Purifi-er ?Value Pack?Including 2 main filters ,1 activated carbon filters and 2 carbon pre-filters at low cost. Besides,please note that we have attached carbon pre-filters on both the two main Filters ?Premium Filter?The main filter helps to absorb fine airborne particl-es down in a short time in your home,office or school ?Activated Carbon Filter?The activated carbon filter help to absorb household smell from cooking ,smoke ?Replacement Frequency?For optimal performance,we recommend to replace each main filter every 6-12 months depending on using environment ?Tips? While the unit is on, press the filter reset button for 5 seconds to reset the replace filter indicator light