Features:1.Mini portable air purifier.The necklace is designed to be portable and suitable for personal use.2.Effectively purify air remove PM2.5 dust harmful substances etc.3.Particularly suitable for children the elderly pregnant women and people with allergies to pollen.4.28 hours of continuous use when fully charged5.Protect you from dust and odor in daily life.Safer and healthier.6.The sound is very quiet during operation without disturbing you when you work or rest giving you a quiet environment.7.USB charging long life can be charged at any time.Notice:Actual color may be slightly different from the image due to different monitor and light effectPlease allow 1-3cm deviation due to manual measurementSpecification:Material:ABSCharging method: USB chargingRated power: