Sleep in total silence. No need to tolerate hums and whistles. The peaceful sleeping atmosphere for you.and safely every night thanks to the auto-shut off feature and nearly silent operation. Ultrasonic atomization technology, delicate humidification. Water shortage automatically shuts off and is safer. 35dB quiet atmosphere and the sleep mode can provide a calm and comfortable sleeping night. Portable for gym, yoga, room, office, SPA and bedroom, letting you enjoy life at anytime and anywhere.