This is a diffuser with a 500ml water tank, also an aroma diffuser, or simply as a humidifier.<br>This aroma diffuser comes with essential oil set, which has 8 kinds of essential oils.<br>It's an 8-12 hours diffuser with 7 soothing colors led light.<br> Humidifier and diffuser combo with timer (1H/ 3H/6H/steady on), will auto shut off when time is up or water runs out.<br>Ultra-quiet make sure you sleep comfortably.<br><br><b>Mist Control:</b>< br>Press the "MIST" button for one second, you will hear the sound "DI" then choose the timer from 1H/ 3H/6H/steady on/turn off. Press the button and wait for a while, the aroma diffuser will continue to produce cold mist.<br><br><b>Light Control:</b><br>Press the "LIGHT" button to turn on the LED light, the color will change automatically. Press the "LIGHT" button again to fix the color. If you need to turn it off, please long press the "LIGHT" button.<br><br><b>What's in the box:</b> 1 x 500ml Essential Oil Diffuser, 1 x Adapter; 1 x Measuring cup; 1 x Us er Manual; 8 x Bottles of essential oils(all in the water tank).