The purpose of the present invention is to provide a method and an agent to efficiently inhibit the function of the drug efflux pump of Pseudomonas aeruginosa. A second pilot signal is then applied to the circuit and the resulting output power of the circuit is detected. An interface unit can receive the reception signal data from the data processing unit, serialize the reception signal data, and send a third electric signal comprising the reception signal data to a network device that the pluggable optical network unit is plugged into. The visible graphical information indicates an operation that the user can select and transmit to the computer system by reading the coded data with the sensing device.