A commercial product configured to detect operation to the commercial product and to transmit the detected result, and a digital signage including a signage board configured to output visual content, a content storing unit which stores visual content corresponding to each of a plurality of kinds of operation of the commercial product, a communication unit configured to receive a result of detection from a transmission unit of a detection apparatus, a CPU configured to read corresponding visual content from the storing unit based on the received result of the detection and to make the signage board output the read visual content are included.