This innovation enables the effective formulation of 2 million neg­ative ions/cm³ every 0.6 seconds around the user's facial area. Since most of the airborne particles are positively charged, these negative ions quickly attach itself to these airborne particles within close proximity, turning them into bigger & heavier particles causing them to fall downwards away from your face. Features: Scientifically proven to reduce inhalable pollen, allergens, viruses, bacteria, smoke, PM2.5 and pet dander Super light and comfortable to wear Multifunctional air purifier that comes with a titanium necklace, a collar clip for dresser occasion, and a charging dock that can also be used as a desktop air purifier 28/32 hours long battery life keeps you worry-free for days No need to replace filters and fans Complying anti-allergy, low radiation/electronic current, low ozone standards Quiet operation Small and lightweight Specifications: Dimensions: H:1.4 x W:22.0 x D:22.0 cm Colour: White Guarantee:2