Sleep within a Sound of Silence: For a halcyon and healthier sleep at night, YIOU air purifiers for bedroom can work at 20dB in sleep mode with the indicators half on or off and no buzz or beep. Certificated Air Cleaner: Complying with Part 15 of the FCC rules, YIOU air purifier has a CADR of 140 CFM for smoke, 139 CFM for dust and 144 CFM for pollen, effective for wildfire smoke and allergies larger than 0.3 um.
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