Portable Handheld Nebulizer Mist Inhaler and Atomizer SP Quality - Atomized particles less than 5 μm with condensation rate larger than 0.2ml/min. Portable Size - Mini size design size make it easy to carry, weight only 115g, lighter than a cellphone and able to carry in pocket, handbag, computer bag. Easy to Clean and Use - Easy to assemble, filling the medicine container max to 8cc, one button and one press will start operate the Nebulizer. 2 Power Supply Mode - It could be powered by battery/USB cable, use 2AA batteries (not included) for out side use and USB cable for home use. Quiet & Noiseless - The product are quiet and noiseless, sound less than 25 dB when operating the nebulizer.