Do you still buy expensive air purifiers? Just download this app and feel the fresh feeling. You can feel cool air on your mobile phone. This is a Mobile Phone Air Purifier It works better with fans and air conditioners.^^ white noise from office, house, school, car,baby etc. 1.Enable on-off power button operation 2. Adjust the wind strength in 3 stages CAUTION: This machine does not actually have an air cleaning function