A method and system for synchronizing two clocks of a first and second device. In some embodiments, the method can use an indirect competitive immunochromatographic test strip. And it registers the input information and the stop information as an operational flow. With relative rotation between the inner race and the outer race, when each cage separate body is displaced toward an inner peripheral surface side of the outer race, a top portion of each projecting portion is brought into contact with the inner peripheral surface of the outer race. When the male type connector assembly and the female type connector assembly are connected together, the contact is connected to a receptacle contact mounted on the female type connector assembly.