About this item^ Effective Clean the Air: This travel air necklace can produce 200,000 aions per second that effectively push harmful substances away from your personal space. Millions of ions can effectively clean the polluted and indoor harmful substances, such as the dust, secondhand smoke etc.^ Benefits: Minus-ions, which exist in waterfalls, forests, seashores in high concentration, has many positive effects on human's physical mental health. Breathing in these contributing ions have a relaxing effect and relieve tension, bring you a good mood.^ Simple to Use: Using this air necklace couldnt be easier as one-button operation turns it on off. The low power consumption and low noise make it affordable to run and quiet.^ Large battery: USB Rechargeable, can be charged by adapter, pc computer, power bank. With upgraded lithium battery, can be used up to 48 hours after fully charged, provides you fresh air surroundings whole day.^ This air necklace is wearable and lightweight, wear it around your neck,hang in the car. Whether you're traveling by plane, train, bus or in the gym, in the crowded elevators, or in the office, you can wear it and enjoy the safe, clean air. Perfect gift for kids, pregnant, allergies, smoke-hater, etc.^