Hanging neck air purifier in addition to second-hand smoke purifier portable negative ion air purifierWorking principle:The air purifier releases negative ions,Attach them to the air around youAnd the unclean particles in the air,Make them negatively charged.The negatively charged examples are mutually exclusive,Fly away from your breathing space,Attracted by nearby positively charged surfaces,Form large particles and sink to the bottom,So as not to enter your respiratory system.Specifications:Product Name: Air PurifierMaterial: ABSColor: white/black/pinkVoltage: DC5VPower mode: USBWorking hours: about 48HBattery capacity: 450mAhApplication area: less than 10Filter type: composite filterWorking principle: negative ionAnion concentration: 6 million pieces/m3Air volume of air purifier: 50m/hFeatures:-Ultra-quiet design.-Effectively remove PM2.5,TVOC, benzene, formaldehyde, pollen,Toxic gases such as second-hand smoke are purified.-The appearance is stylish, small and exquisite, and does not take up space.-USB ultra-low voltage power supply, safe and no electric shock.-Suitable for cars, homes, offices, etc.-With lanyard, easy to wear,It can be hung directly on the chest or put in a pocket,Disinfect and sterilize anytime, anywhere.Package includes:1X Air Purifier1X USB data cable1X Lanyard