1. Product features: * brand new and high quality * Made of high-quality materials, durable * Other features: 1. Negative ions effectively purify the air, remove PM2.5, dust, harmful substances, viruses, bacteria, etc.; 2. Especially suitable for children, the elderly, pregnant women and those who are allergic to pollen and odor; 3. Effectively control bacteria and other infections around people, stay away from respiratory diseases, etc.; 4. charge can be continuous for 30 hours -60 hours 5. Special protection for pregnant women and children who are susceptible to air infections; 6. Purify the surrounding environment anytime, anywhere 2. Product parameters: * Product name: hanging neck purifier * Material: ABS+PC * Colors: White, Black * Voltage: DC5V * Power: