Mini Spray Colorful Humidifier Features： 1 The 300ml water tank design can provide the air with moisture for up to 4-6 hours. 2 Quiet operation with less than 30dB. 3 USB powered convenient to carry. 4 Automatic switch-off.once the water runs out it will be auto shut-off to protect the device. 5 Offers up to 6 hours runtime. 6 Cost-effective compared to larger versions. HOW TO USE IT? Installation of springs and swabs; Add water into it; Plug in the USB power cord; Push the power button to start the mini humidifier. HOW TO TURN ON THE MODE? Push the power button 1 second to start the continuous mode; Keep pushing the power button for 3 seconds to start the night mode; Keep pushing the power button for another 3 seconds to start the colorful mode;