A cartridge to be housed in a cartridge seat made in a device body of a dispenser device for jets of water, comprising: - a cartridge body, comprising a first compartment and a second compartment, said second compartment being separated from said first compartment by a watertight separation septum, the cartridge body comprising an entry aperture for the entry of a flow of water into the first compartment and at least one exit aperture opening toward the outside environment for the exit of the flow of water from the first compartment; - a generator housed in said first compartment, said generator being suitable for being driven by a flow of water which crosses said first compartment from the entry aperture to the at least one exit aperture; and - at least one electronic device housed in said second compartment suitable for generating a secondary effect perceivable by a user, said electronic device being powered electrically by the generator, the second compartment being separated from the external environment by a separation element suitable for allowing transmission of said secondary effect towards the outside environment, wherein - the cartridge body comprises a cylindrical shape with a cartridge axis (X), - the entry aperture and the separation element are provided at opposite ends of the cartridge body along the cartridge axis (X), - the first compartment is superposed on the second compartment along the cartridge axis (X), and - the at least one exit aperture of the water is directed radially with respect to the cartridge axis (X), characterized in that in the bottom side of the separation element (13; 1004) a plurality of apertures are made suitable to be engaged by a crown of teeth of a spanner utilisable to screw/unscrew the cartridge to/from a dispenser device of the jet of water. - a cartridge body, comprising a first compartment and a second compartment, said second compartment being separated from said first compartment by a watertight separation septum, the cartridge body comprising an entry aperture for the entry of a flow of water into the first compartment and at least one exit aperture opening toward the outside environment for the exit of the flow of water from the first compartment; - a generator housed in said first compartment, said generator being suitable for being driven by a flow of water which crosses said first compartment from the entry aperture to the at least one exit aperture; and - at least one electronic device housed in said second compartment suitable for generating a secondary effect perceivable by a user, said electronic device being powered electrically by the generator, the second compartment being separated from the external environment by a separation element suitable for allowing transmission of said secondary effect towards the outside environment, wherein - the cartridge body comprises a cylindrical shape with a cartridge axis (X), - the entry aperture and the separation element are provided at opposite ends of the cartridge body along the cartridge axis (X), - the first compartment is superposed on the second compartment along the cartridge axis (X), and - the at least one exit aperture of the water is directed radially with respect to the cartridge axis (X), characterized in that in the bottom side of the separation element (13; 1004) a plurality of apertures are made suitable to be engaged by a crown of teeth of a spanner utilisable to screw/unscrew the cartridge to/from a dispenser device of the jet of water. <EOS>