Portable Air Purifier Mini USB Wearable Necklace Negative Ionizer Anion Air cleaner Air Freshener PM 2.5 Anion Air Purifier Sterilization Purism
- Color: White/Blue/Brown
- Negative ion concentration: ≥7 million/cm3
- Material: ABS
- Size: 2.0*4.6*5.7cm
- Charging time:about 30 minutes
- Length of use:5 hours
- Power Supply:USB
- battery capacity:180mAh