Wearable Necklace Purifier Mini Portable Negative Generator Low Noise Features: 1.Mini portable purifier.The necklace is designed to be portable and suitable for use. 2.Effectively purify, PM2.5, , harmful substances, etc. 3.Particularly suitable for children, the elderly, pregnant women and people with allergies to. 4.28 hours of continuous use when fully charged 5. you from and odor in daily life.Safer and healthier. 6.The sound is very quiet during without disturbing you when you work or, giving you a quiet environment. 7.USB charging, long life, can be charged at any. Notice: Actual color may be slightly different from the due to different monitor and light effect Please allow 1-3cm deviation due to manual measurement Specification: Material:ABS Charging method: USB charging Rated power:<1W Rated current:<10mA Rated voltage: 3.5V Package including： 1x Necklace Purifier 1x USB Charging Cable 1x Manual