The Miko HEPA Air Purifier with Essential Oil Diffuser, 3 Speed Ibuki Air is a modern unit suitable for any room. It features 4Hr, 8 Hr & Continuous timer control, 3 speeds, and a Fan Function. With a 400 sq ft coverage, HEPA-Type filtration technology captures allergens, dust, and pollen. The unit also includes Automatic Shut Off, Filter Life Monitor, and operates at a low 25 dB sound rating.