Features: brand new and high quality Outdoors filter pathogenic bacteria in the air to protect your for health. Lightweight and comfortable to wear. Ultra-quiet design, powerful purification, quiet and for fresh. No consumables, more worry-free. Say goodbye to the trouble of regular replacement and maintenance of traditional purification. Long standby for time, USB charging is universal and convenient. The high concentration of negative ions can be hung in the rearview mirror of the car to freshen the air and make the mood happy. Specifications: Material:ABS Size:Approx.1.7x4.7x4.7cm/0.67x1.85x1.85inches Color:Green/Pink/Yellow Battery 250MAH, charging 0.8h, working 12-20h Power: 0.1w Purification principle: negative ion Anion amount: 1500w Voltage: DC5v Power supply mode: usb Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Air Purifier