Features 1、SAFE PURIFY: The air purifier necklace has no electric shock and is very safe. Release 2800W/cm³ of negative ions to purify space. is an ionizer that does not create air transfer effects like a fan 2、ENJOY CLEAN AIR: The mini air purifier produces negative ions that attach to the impurities in the air, making them larger and heavier, accelerating to the ground, which forms a microscopic health barrier, allowing you to enjoy clean air at any time 3、LONG LASTING BATTERY LIFE: Can effectively resist impurities in the air. USB charging interface, charging for 3 hours can be used for 30 hours. No need to replace accessories, easy to carry 4、SMALL AND PORTABLE: The wearable air purifier is simple and compact, can be hung around the neck or on the car. Very stylish and can be used in offices, subways, airplanes, etc. 5、BEST CHOICE: Small size and light weight is very suitable for children, students, the elderly and other groups. you can take better care of your family Specifications Item Type: Air Purifier Product Size: Approx. 88 x 30 x 17mm / 3.46 x 1.18 x 0.67in Built in Battery: Polymer lithium battery 3.7V 500mAh Light Source: UVC purple light Rated Power: ≤1W Working Temperature: 10℃-50℃ Working Current: 25mA Charging Method: USB Number of Negative Ions Released: 2800W/cm³ Applicable Area: 1m³ Material: ABS Use Time: 30H Weight: 94 g / 3.3 oz(approx.) Package List 1 x Purifier 1 x USB Cable 1 x Lanyard 1 x User Manual