PortableThe nebulizer weighs only 90g, lightweight and portable.PowerfulIts powerful atomizing ability can atomize the liquid into particles less than 5um.Easy to UseOne-button simple operation, even old people and children can learn easily, ideal for all ages.Two Power Supply ModesThe device can be powered by 2 x AA battery ( not included ) or directly powered by USB cable.How to Use:1. Take out the machine and check if it is powered.2. Easily open the liquid cup and add the right amount of liquid.3. Install the cover or mouthpiece.4. Press on/off key to start working.5. Start atomizing.6. Press the key to turn off the machine.