... shape necklace Ozone-free compact negative ionizer fresh air Portable air purifier Material: ABSDimensions: 60*64*26.5 mmColor: red, Pearl ... supply: 3.7v/400mAh battery (lithium battery)accessories : 1xair purifier, 1x double cable, 1x power adapter Product use:(1) ... furniture decoration formaldehyde, benzene, ammonia smell(4) crowded place, air pollution, the spread of germs Portable air purifier