Characteristics: 1. Advanced pulse technology is used to release a large amount of oxygen anion. Latest double carbon brush negative ion generator design uses over 6 million negative ions to effectively remove harmful substances such as floating dust, smoke, formaldehyde and PM2.5 from the air . 2. release a large amount of oxygen anion, kill harmful bacteria, mold and viruses, break down smoke, odors and formaldehyde, benzene and other harmful gases released by car parts (such as than leaf, leather). Color: pink / blue 3. Negative ions promote metabolism, activate cells, refresh and relieve motion sickness. 4. Mini, portable necklace design, stylish and convenient to carry. 5. Easy to use, one button for on / off. Just press the button for two seconds to enjoy the fresh air. Material: ABS Size: 1.5 * 5.7 * 4.5cm Charging time: about 30 minutes Duration of use: 5 hours Power supply: USB Battery capacity: 300 mAh Package including: 1-piece air purifier collar * 1 pieces * charging cable 1 pieces * instruction manual Only the contents of the above packaging, other products are not included. Note: Light shooting and different displays may cause the color of the item in the image to be slightly different from reality. The allowed measurement error is +/- 1-3 cm.<img src="https://cc-west-usa.oss-us-west-1.aliyuncs.com/20200304/208822998878.jpg"> <img src="https://cc-west-usa.oss-us-west-1.aliyuncs.com/20200304/6808797714560.jpg"> <img src="https://cc-west-usa.oss-us-west-1.aliyuncs.com/20200304/1201502416585.jpg"> <img src="https://cc-west-usa.oss-us-west-1.aliyuncs.com/20200304/703363822527.jpg"> <img src="https://cc-west-usa.oss-us-west-1.aliyuncs.com/20200304/2776053201816.jpg"><img alt="undefined" src="https://cc-west-usa.oss-accelerate.aliyuncs.com/16778016/1631728666310479872.jpg" max-width="1000" style="font-size: 14px;">

USB Mini Portable Air Purifier Necklace