What it is: An electric wall fragrance diffuser with a sophisticated design to be compatible with any diptyque diffuser cartridges to perfume any room. What it does: Activate with a simple touch anywhere on the vent to switch the device on and off. Turn the device on and wait for the fragrance of your choice to fill the room. Electric Wall Diffuser is sold without cartridge. How to Use: Activate with a simple touch anywhere on the vent to switch the device on and off. A light puff of air indicates that the ventilation system is on. The diffusion stops just as instantly as it started (manually or automatically after a preprogrammed cycle of about 3 hours), leaving no trail, allowing you to choose and change the fragrance as you wish. The refill (sold separately) is interchangeable at any time, as the diffuser does not retain any traces of the previously used fragranced refill. The cartridges can be kept for up to three months after opening, provided the container is properly closed after use. They have a lifespan of 40 hours continuously, ie up to 80 diffusion cycles (1 cycle corresponding to 1 hour). Made in France