Obreeze HZ114 Cool Mist Humidifier, Portable with Blue LED Light, Premium Humidfying Unit with Low Noise, Whisper Quiet Humidifier with 3 Modes Mist Volume Pressing on the button one time will have humidifier work at its maximum and produce the most mist. Pressing the same button twice, will create a medium amount of mist. Pressing the button three times, will have the humidifier at low setting. It is highly recommended to have the humidifier set at low setting. When using Option 1 and 2 place the humidifier on the edge of the table so the mist will disappear into the air by the time it hits the floor and prevent any dampening. Low noise &lt;35dB(A) Arm with all-electric adapter (100-240V) Comes with a blue LED light Small, compact, and portable 3 modes for mist volume: High, Medium, Low Auto-off when water less with refill indicator Can only be used as a humidifier