When injecting less than 300ml of water at a time, it can be used for approximately 10 hours in continuous spray mode. [Ultrasonic Desktop Humidifier] Creating a clean environment, ultrasonic atomization creates natural and comfortable moisture. High-frequency vibration through the atomization piece breaks down the structure of liquid water molecules to generate mist. After atomization, it releases many negative ions, purifying the air and preventing harmful substances and pollen, etc. It is a small humidifier that can also prevent air purifiers and diseases.