Description: air volume control: low, medium, high-speed noise level (db): 15-45 power consumption (W) 40W Voltage: AC 100V-240V amount of negative ions: 10 * 106ions / cm3 Product Weight: 7KG fitness area: 50 square meters CADR: 420 Accessories: manual, warranty card, certificate 1, HEPA filter: HEPA PM2.5 less specific particle contamination filter, particle removal efficiency ≥99.9%, the smallest particles purify up to 0.003 microns. 2, activated carbon filter: efficient removal of formaldehyde, benzene, and its removal efficiency of 90% and 72.9%, respectively. 3, ion group: generating 10 million negative ions per second. 4, with the third gear wind, for different use of space, the largest for an area of ??60 square meters. 5, the unique super mute function, so a quieter night's sleep