[USB plug-in power supply] This rain cloud humidifier is plugged in and used with the USB cable to power. In addition, it is compatible with the power adapter of the mobile phone. Suitable for voltage of 5V.The rain cloud humidifier works smoothly and quietly.Made of premium BPA-free materials and automatically shuts off when it runs out of water to use. [Fragrance Refresher] Add 2 drops of essential oils to the rain cloud aroma diffuser humidifier which will release the fragrance into the room. Create a relaxing and comfortable environment. The essential oil will diffusing as water flows and adding water can last the fragrance for more than 48 hours.(Essential oils are not included in the package) [Easy to use] This cloud humidifier from rain is easy to use. First, press the medium power button to turn on the rain cloud humidifier. Long press for 3 seconds to set the automatic shutdown after 5 hours. Press the Light button to change the light color; 3 seconds, press the light button switching to breathing mode. [Multifunctional Design] This rain cloud humidifier is multifunctional compound which not only has humidifying function but also available add essential oils as aromatherapy diffuser.Rain cloud design simulating the sound of rain which makes it easier to listen to the rain and fall asleep. With 7 colors easy to adjust lights design, perfect as ambient light and night light. [Comfortable Ambient] This rain cloud humidifier has 7 colors of colors, and the brightness and dripping speeds of the rain cloud humidifier are adjustable which are perfect for adjusting the rain cloud humidifier according to your preference and create a comfortable atmosphere to fall asleep better.