Features:1.BREATHE CLEANER AIR:This personal air freshener emits more than 3 millions negative ions that push pollutants away from your personal space. Scientifically proven to away most of cooking smells and even PM2.5 air pollutants, improve mood and sleep2.TAKE IT ON THE GO:You can wear it around your neck since this mini air purifier comes with a strap. Wear this to create a cleaner zone of good air while traveling, in public places or in other poor air quality locations.3.PROTECT YOU QUIETLY:Using advanced fan, the sound is very quiet during operation without bother you when you working or taking a rest. Easy to operate, just press the button for two seconds to enjoy the fresh air.4.LONG-LASTING:Low battery usage and rechargeable. Charge half hour can be used for about 10 hours ensuring your protection against airborne pollutants; The perfect accessory to protect you during flu season.5.BEST CHOICE:Say goodbye to ordinary big size air purifierThis portable ionic air fresher is great for people with allergies, asthma, stuffy nose, and other breathing sensitivities. Avoid Nasty Artificial Scent.Functions:1.Mini,portable necklace design, stylish and convenient to carry.2.Multi functions to purify indoor air.3.Release anion groups, improve air quality effectively.4.Easy to operate, one button for on/off.5.Rechargable battery.Specification:Power Supply:USBWorking principle:anionsApplicable area:below 10Square meterFunctions:air fresherFilter type:noAnion density:1Square meterSize:3.9x1.65cmNoise:5dBincludes:1x Necklace1x Charger