To allow a customer to optionally select and play music contents such as CD, and to provide information useful for the customer regardless of purchase of a commodity.

An RFID tag 30 is stuck to a package of music contents. Performance information (MIDI, SMAF and so on) of a phrase (e.g. peculiar part) of part of a music piece or PCM data are stored in the RFID tag 30. A user of a cellular phone 1 makes the cellular phone 1 approach the RFID tag 30, and performs predetermined operation to acquire the performance information or PCM data, and previews the above by the cellular phone 1.