This ionic air freshener can remove odors and pollutants The personal ionic air freshener can clean air around you make you breathe more healthy It can release negative ions into air and moderate to neutralize odors from tobacco, smoke, dust, etc The function can make air with negative ions It can moderate to neutralizes odors from tobacco, smoke, dust This battery operated air freshener has a green LED on/off indicator The personal ionic air freshener comes with a neck string for hanging around the neck It includes an easel back for it to stand on counter tops, desks and other surface This portable ionic air freshener is great for personal, home and office use