Color:Black Specifications: Type: Negative Ion Battery: 3.7V Lithium Battery Anion Concentration: 8000-12000W/cm³ Rated Frequency: 50 (HZ) Application area: <10㎡ Air Volume: 51-150m³/h Noise: 20dB Power Supply: USB Rated Power: <1W Current: <40 mA Battery Capacity: 700mA Material: ABS, Stainless Steel Color: Black, White(optional) Weight: 153g/5.4oz Size: 15*9.5*3cm/5.9*3.7*1.2in Package List: 1*Necklace Purifier 1*USB Cable
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