Super Efficient Purification: This ion air purifier releases more than 120 million negative ions to purify the air to remove contaminants in personal spaces. It can effectively purify the air polluted by indoor air and indoor harmful substances thereby improving your mood and sleep.Portable & Durable: This mini air purifier is simple and compact. It can be hung around the neck or on the car. It is very fashionable and can be used to create clean, good air areas in travel, public places or other places with poor air quality. Let fresh air stay with you forever. Key Product FeaturesNo Noise & Gear Adjustment: The sound is very quiet during operation, and will not disturb you during work or rest. The operation is very simple, just press the button for two seconds to enjoy the fresh air. This purification necklace is more efficient than other brands to purify the air. You can configure your air butler according to different environments.Lasting Battery life: The portable ion air purifier has a USB charging port, which can be used for about 60 hours after 2 hours of charging to ensure fresh air and protect you during the flu season.