A dispenser device includes reservoirs for containing respective substances, pumps associated with respective reservoirs, and a pushbutton. The device allows two substances to be dispensed in varying proportions by actuating the pushbutton. In embodiments, each pump has a moving control member which, when actuated, causes the substance contained in the reservoir associated with the pump to be dispensed. In embodiments, at least one elastically-deformable transmission member is associated with a control member and is disposed in such a manner as to transmit displacement of the pushbutton to the control member in order to dispense substance. In embodiments, at least one adjustment member adjusts the end-of-stroke position of the displacement at least of the control member associated with the transmission member.