I am currently working on an essential oil diffuser controlled by a mobile application. This object has a waterproof liquid reservoir, the ultrasonic wave nebulizer has an electronic oscillator able to generate a high frequency ultrasonic wave when the user activates the diffuser with his smartphone, and that causes the mechanical vibration of a piezoelectric element. This vibrating element is in contact with the liquid reservoir (which contains water and essential oil) and its high frequency vibration is sufficient to produce a vapor mist.