Features: -There are two gears (high/low) in total, which can be adjusted as needed to achieve the best effect. -Built-in rechargeable battery, can be used for 30-60 hours after charging. -The use of electrolysis to generate negative ions can form a microscopic health barrier that can effectively fight against air pollutants such as pollen, dust, and secondhand smoke. -It adopts a small and compact design and can be worn around the neck, making it convenient to use in complex places such as cars, offices, subways, airplanes, bedrooms, etc. -It is very suitable for children, students, the elderly and other groups to better protect their health. Specification: .
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