1. This plug-in mini negative ion air purifier adopts advanced negative ion purification technology, which can effectively filter out odors, formaldehyde, second-hand smoke, PM2.5 and other harmful substances in the air, providing a healthier and fresher indoor environment. 2. This product is equipped with dual engines and dual modes to freely control the exclusive fresh air. It uses dual negative ion emitters to release 200 million negative ions for all-round purification. The released negative ions can gather and settle suspended particles in the air. 3. The product adopts intermittent purge and continuous purge modes, which can automatically adjust the purification effect of negative ions according to different environmental requirements, making the purification more scientific. 4. The plug-in negative ion air purifier has ultra-quiet technology, and the noise is lower than 36 decibels, so that you will not be disturbed by the noise while enjoying the fresh air. 5. The product adopts the design of environmental protection and no consumables. The negative ion generator does not need to be replaced for life. At the same time, it adopts a delicate and compact design.