2 Units portable negative ionizer micro air purifier to remove second-hand smoke hanging neck purifier necklace

Power supply method: USB
Product Category: Air purifier, ionizer
Colour: Black
Way to control: Push button
Filter type: No filter technology
Air purifier air volume: 50 cubic meters/hour
Features: Sterilization
Use environment: Home & Personal Wear
Rated frequency: 50
working principle: 120 Million Negative ions