MIFAVOR Portable Ionizer Air Purifier Mini Personal Wearable Necklace Travel USB Rechargeable Negative Ion Generator

MIFAVOR travel size air purifier around the neck using the latest technology, providing fresh air anywhere you are. Specifications : Charge source : DC 5V 150mA Charge time : about 4 hours Working current : about 35 mA Anion quantity : about 200-300W / cm3; Unit size : 57x47x22mm ; Net weight : approx. 40g ; Battery : 3.7V / 500mAH lithium battery ; Battery working time : about 30 hours ; Package includes : 1 x Personal air purifier, 1 x USB charge cable, 1 x String, 1 x Instruction Warranty: 12 months warranty plus lifetime technical support. Notice: Please turn off when charging. If not, that's possible can't be charging again. Due to everyone feels different, if you are not sure if it's effective on you or just dislike, please packed well and return. You will get refund. -Why is it not working? Why I couldn't feel the air blew? In fact, while it's turn on there is very small air flow, you almost can't feel it, but you can smell a little, because the small air flew is from the brush of the hole, the negative ions will come from that. You can feel it's working. -Why doesn't reduce smoke or odors? It's small and just for personal use around neck. It can't reduce most of the smoke in your area, just to reduce smoke or odors around your neck and make you feel heathy. If you want to test, you can send a little smoke in the transparent packing bag and the device will clear that.