● Generates Negative Ions Generates negative ions through plasma discharge. Produces 1.23 million ions/cm. ● High Removal Power Effectively breaks down particulate matter in the air, including PM2.5, formaldehyde, bacteria, pollen, and secondhand smoke. ● Consideration for Others Features a completely silent (0dB) fanless design for quiet operation. Includes a neck strap made with titanium material. ● Titanium Material The necklace incorporates titanium material, which is said to improve blood circulation. The necklace can be used on its own. ● Charging Time Approximately 28 hours of continuous use, approximately 3 hours charging time (when charging from an AC adapter) Product Name: Neck-worn Air Purifier Model Number: ible Airvida M1 Specifications: Body: 57mm wide x 20mm high x 14mm deep Neck Strap Size: Strap only approx. 450mm, Overall approx. 500mm (can accommodate neck circumferences up to 480mm when worn) Weight: (Body) 20g, (Charging Dock) 40g, (Neck Strap) 10g Accessories: Charging dock, USB cable, collar clip, brush cleaner ※ This is a new, unopened item, but it is an earphone that was found during a thorough cleaning. Since it has been a long time since it was sold, the operation cannot be confirmed, so it will be treated as junk. ・ Limited quantity! First come, first served ・ Only this price now ・ Very popular product Please refer to the photos for details. Shipping within 24 hours Free shipping nationwide. We are not offering discounts on this product. Thank you for your understanding. Please feel free to ask if you have any questions!