One Button ControlThe portable USB humidifier is very easy to use. One button controls all functions, just press the power button every 1 second to control the mist. Continue to pressthe power button for 3 seconds to activate the night light and colored light function. Silent Operation Thanks to its ultrasonic technology, humidification is done discreetly (30dB) in a fine and cold mist. You can leave it on when you sleep or work and you hardly feel it. Safety with Auto Shut-offThe personal baby humidifier will automatically shut off at the specified time (4 or 8 o'clock). Or when the water runs out, it will also be an automatic shutdown. Besides, it is small, light and easy to carry.and suitable for different occasions: bedroom, office, car, office, yoga room, travel and hotel. It can protect your skin, purify the air and keep you healthy. Perfect GiftsAn elegant decorative piece. perfect for men and women at home and offices. It is a good choice to use this cute humidifier as a gift for your friends and family, your lover.