Fecha de publicación: 21/11/2019 Fuente: WIPO "miel" A system for carrying out a treatment of the head of hair, especially a shampooing operation, to be connected to at least one water inlet, the system including at least one source of cosmetic product, an adjustment device making it possible to modify at least one usage characteristic of at least one product conveyed to the head of hair, a user interface, enabling the user: to select a setting, the system being configured to act on the adjustment device as a function of the selected setting, and to input at least one item of information relating to a treatment result obtained with the selected setting.