Features: Compact size, neck-hangs design, lightweight and portable, purification airs wherever you go. Adopts intelligent Al chip ensures that the purifier can stably release negative oxygen ions, circularly purify and breathe freely. Low interference, low noise, low maintenance costs but can provides long service time. 2 operation modes design, you can adjust to high gear or low gear according to your demands easily. Releasing 12000W anion/cm³, it can effectively remove dust, PM2.5 and formaldehyde in the air. Rapid air purification in few seconds, with 60 hours of strong endurance, protect your free breathing. The double negative ion generators have no filter net to purify the air fresher, and the 0 consumables are more environmental friendly, and purify the air for a long time.