【Air Purifier Quiet & Earned the Certified】:The noise level of the hepa filter air purifiers is as low as 23 dB, is as silent as your own breath, ensuring a peaceful and undisturbed environment while still providing effective purification. And you don't need to worry about the quality of the product, all of our materials are carefully selected, and the air purifier has also undergone multiple quality tests, which earned the certified of CE/FCC.