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Anionic: characterized in that the air cleaner can generate negative ions. Anion be used to enhance the body's metabolism and homeostasis. Easy To Use: Press the on/off button for 2 seconds and the lights in green to get better quality air. Rechargeable: With USB charging battery, charge 2 hours can be used for about 48 hours. You will get high quality air and reduce unpleasant smell. No Filter Needed: You'll never have to worry about the expensive and burdensome filters. Without any additional costs, just a quick charge. Widely Used: Necklace, Hanging Stuff, Car, Kitchen, bedroom, bathroom, living room, office, Garages, etc. Purify the air for small spaces and make your living area smell fresh and clean. Input voltage: 5V Power consumption: less than equal 0.2W Negative ion concentration: 2,000,000pcs / cm3 Charging time: About 2 hour Battery life: more than the 48 hours Weight:30g colour:Black/White Material:ABS size:55*17*60mm Package Contents: 1 * air purifier 1 * usb cable 1 * Lanyard 1 * User manual<br />Only the above package content, other products are not included.<br />Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.