300ml 7-Color LED Night Light USB Humidifier Portable Mini Humidifiers Personal Desktop Humidifier Quiet Air Humidifier with 2 Modes and Auto Off for Home Office Car Bedroom Travel,the cool mist mini humidifiers feature one-button control for all functions, you can simply control the mist by pressing the power button every 1 second, or enable night light and colorful light functions by keeping pushing for 3 seconds, can choose the mode according to your needs and very easy to operate