Colour:Silver ▼Product informationProduct model: BY-7078Rated power: <1WRated voltage: 5VDCNegative ion amount: 300-500 million / cm³Standby time: about 35 hoursCharging method: USB chargingProduct material: ABSProduct color: white / silver▼Working PrincipleRelease negative ionsThe negative ions are released into the air using a built-in carbon fiber brush system. The released negative ions are attached to the air molecules as well as to the unclean particles in the air, causing them to have a negative charge. Negatively charged particles repel each other, fly away from your breathing space, and are attracted by a nearby positively charged surface, forming large particles that settle to the ground by gravity and thus avoid entering your respiratory system▼No fan no noise. It's a silent state at work. It do not disturb your rest and let you fall into sleep▼Purify the Air Purify the invisible drifting dust, PM2.5, smoke, pollen, etc. by negative ions, so that every breath is cleaner▼Convenient Charging Its bottom is the USB port, and you can charge it anytime and anywhere when the power is running out
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