Material:ABSVoltage:3.7VPower:1W1.[WEARABLE AIR PURIFIER] : Necklace design, small and light, easy to carry, can be hung around the neck, or put in a pocket or bag, no noise when using2.[MORE ENERGY & ALERTNESS] : Having cleaner air around can help you feel more refreshed, focused and energized, otherwise you may feel tired and sleepy3.[ONE-CLICK DESIGN] : The hanging neck air freshener has a stylish and simple shape and adopts a one-click design. The purification effect; low power mode, the purification time is the long, and the decibel is low4.[FAREWELL TO THE FILTER] : No filter, environmental protection and no consumables. The mini air filter uses electrostatic purification technology to discharge millions of negative ions into the air, leaving you in clean air5.[RECHARGEABLE DESIGN] : Replacing batteries is a thing of the past, and the necklace purifier is charged via a USB cable. Runs for hours on a single charge, reducing your exposure to air pollutants