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, - the entry aperture and the separation element are provided at opposite ends of the cartridge body along the cartridge axis, - the first compartment is superposed on the second compartment along the cartridge axis, and - the at least one exit aperture of the water is directed radially with respect to the cartridge axis, 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, - the entry aperture and the separation element are provided at opposite ends of the cartridge body along the cartridge axis, - the first compartment is superposed on the second compartment along the cartridge axis, and - the at least one exit aperture of the water is directed radially with respect to the cartridge axis, 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.