? Self-Cleaning Mode ? Just fill in tap water or vinegar solution before or after each use. Press switch button to start self-cleaning mode for a few minutes to avoid clogging. ? Waterless Detection Technology ? Designed with waterless detection technology, it is more safe for kids when they use. It will shut off when there is no water and avoid broken the mesh plate. ? Almost Quiet when Operation ? The noise is less than 25dB during working, it is very quiet and does not trouble you when you are busy with other works. ? Fit for Most Respiratory Symptoms ? It produces about 5%B5m fine mist,which can penetrate into upper and lower respiratory tract, bronchus. ? For All People ? It comes with masks for kids and adults and a mouthpiece, which can be used for whole family. Just remember to disinfect mask or mouthpiece after use.