Scope of application: 10-20 square meters. Perfect for travel,bedroom,office, which is effectively moisturize dry skin and help you reduce skin peeling. Portable and small design : 16*10cm is very easy take with you anywhere and super This mini humidifier has two modes. When you press the button first time, it will continuously spray for 8 hours. When you press again and it will intermittently spray (stop 2 seconds) for 12 hours. 500ml large capacity produces longer mist. The portable usb humidifier is very easy to operate. One button controls for all functions, you simply need to press one button to set the mist. Make your life easier! Perfect for a gift to yourself and your family , friend .