It emits negative ions to bind with pollutants within a ~3-foot radius, causing them to fall away from you as you move through different environments. The necklace can be worn around the neck or clipped to clothing, and it charges via USB for long-lasting, low-maintenance use. Air Purifier Necklace Wearable Travel-Friendly Purifier With USB Charging is a compact, pendant-style air purifier designed for on-the-go clean air.

• Ultra-portable & versatile lightweight purifier designed for travel, commuting, and everyday wear, suitable for use in planes, trains, or cars.
• Low maintenance & silent operation no filters to replace and no motors or fans to run, plus a self-cleaning mechanism.
• USB charging + long runtime recharge in about 2 hours and provide roughly 30–60 hours of use per charge.
• Negative ion purification emits ions to bind with pollutants like dust, pollen, smoke, and germs, creating a clean-air field around you.
• Wearable pendant design you can wear around the neck or clip to clothing, with a breakaway safety lanyard for quick-release safety.