<ul><li>Clears the air quickly Allows clean air to be diffused smoothly over a large area, and full coverage and purification.</li><li>48 hours of battery lifePas need to worry about power, the built-in 600mAh capacity lithium battery can be used continuously for 48 hours.</li><li>Air purifyingIt can filter harmful substances in the air and release highly active small particles of negative oxygen ions.</li><li>Necklace Air Purifier This mini air purifier comes with a lanyard, it can be worn around your neck, very convenient and easy to carry .</li><li>Suit for outdoors During travel, in public places or other places with poor air quality, wearing it can create a clean and fresh space.</li> </ul> Specification: Condition: Item Type: Air Purifying Necklace Material: ABS Color: as shown in the picture Size: approx. 8x5.2x2cm / 3.1x2.0x0.8 inch Weight: approx. 130g / 4.6oz Voltage: 5V Power: 0.05W Negative Ion Concentration: 20 million pieces/cm³ Battery: 600mAh lithium polymer battery Endurance time: 48 hours Package List: 1 x Air Purifying Necklace 1 x Lanyard <p >1 x USB Cable 1 x Instruction Manual Note: 1. Please allow 1-2 inch error due to manual measurement. Thank you for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as the standard. Note: The data is all measured manually, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference , the actual object received shall prevail.