A system having a postcard having a thickness not to exceed 5.5 mm while containing an audio message for playback and a power supply, the system also having a base recording unit for recording a message to the postcard when the postcard is inserted into the base recording unit. The base recording unit has no power supply and draws power from the power supply on the postcard. The postcard is suitable for mailing using the postal service. The unit for recording is compact, has no power supply, is easily portable and is attractive. The card has a play-back button, a compact battery power source to drive play-back and recording of audio messages. The postcard is absent a record button allowing the postcard with an audio message to be sent through the postal system without the risk of accidental erasure of the recorded message. The card may be recorded and re-recorded when placed in the recording unit. The card contains an audio board that has an IC chip having memory for storing an audio message. The card and the recording unit are both absent a central processing unit.