Efficient Ionizer Air Purifier: Using advanced negative ion technology with 39 pointed needles fully release a large number of negative ions - up to 200 million/s. The more negative ions, the better the air purification effect. Allowing you to breathe as easily as in the forest, there is nothing better than breathing clean air..Perfect For Every Room: SIYUHO air ionizer will be your perfect choice to improve the air in your home, with high concentration of negative ions to efficiently purify, widely used in living room, bedroom, kitchen, bathroom, office, apartment, dorm, and more..Fresh Air, Healthy Life: Negative ions absorb particles floating in the air, effectively purify dust, smoke, odor, pollen, and more, to ensure fresh and clean air. And negative ions may help you sleep..Quiet and Energy-saving: Quiet and low power consumption. You don't need to replace the air filters..Long Service Life: This ionizer has a smart chip and loop timing function, You don't need to turn it on and off frequently. every time it works for 3 hours, it will automatically stop for 30 minutes, so it is scientific, stable and durable.