{Quiet Nebulization & Complete Accessories} - The operating sound is kept below 20dB. An adult mask and a child mask are packed with the nebulizer as daily use of children and adults. We also prepared 2 mouthpieces, a portable bag, user manual and USB cable for customers. If you have questions about the product, please contact us. {Automatic Switch-off & Easy Cleaning} - ASOMI nebulizer will switch off automatically when the liquid has been almost entirely used up. Easy cleaning: add hot water around 185?(85?) to spray 5 mins. If you need, there are more detailed cleaning instructions in our manual. {Two Working Modes} - This item has two operation modes. The first one is a strong mode recommended for adults, its atomization speed is =0.3ml/min. Press the button again to use the mild mode suitable for children, its atomization speed is 0.2ml/min. Choose the mode you need!. {Ultrasonic Nebulizer} - This ASOMI nebulizer uses ultrasonic directed pressure to atomize liquid into aerosols of small molecules directly into the lungs. Its atomized particles can reach 2?~3.4?, which can fully relieve your discomfort and improve breathing. {Rechargeable Nebulizer} - It is not needed to put in the batteries, just connect the USB cable to charge for a period of time, remove the USB cable, and turn it on for use. It can be used continuously for 40 minutes with a full charge, and will automatically turn off every 5 minutes to give you a rest during atomization, and then turn it on again to work.