AmazingAir 3500 4-in-1 Air Purifier + 2 year Combo Filter PackThe AmazingAir 3500 + 2 Year Filter Combo Pack gives you everything you need for more than two years of pure, worry free air. Right out of the box, youll receive the AmazingAir 3500 with its complete starter package: 1 UltraHEPA filter, 1 Carbon Gas Trap VOC filter (with pre filter attached), and of course the purifier itself. From day one, youll enjoy advanced 3 stage filtration. The UltraHEPA captures 99. 99% of particles as small as 0. 003 microns,