Innovative design,Multi purification system: Pre-filter + HEPA Filter + Carbon Filter + UVC lamp (Optional). H13 HPEA Filter traps the particles, allergen, pollen, dust, smoke and pet dander,3 fan speed setting ( Low, Middle, High). 3 timer setting: 2H, 4H & 8H, With filter replacement warning,With sleep mode offers you a silent and dim sleeping environment. Noise level: 25dB~48dB,CADR: 62 cfm,Dimension: 180x180x300 mm.