2 Mist Mode - Large tank holds 500ml water which works up to 16 hours in weak mist and 8 hours in strong mist.</br>4 Time Setting - 1H/3H/6H/On. The diffuser will stop working automatically when it reaches the time setting.</br>7 Color LED Lights - Multiple illumination?? each color changes between bright & dim and can be set steady on or changing in turn.</br>Safety Guarantee - It will automatically shut off when the unit tilts or there is little water inside to keep safe if you are out or in sleep.</br>Aroma Humidifier - Humidify your living space to prevent dry?? stuffy air and germs by adding water molecule in dry days with your favorite essential oils.</br>