PURPOSE: To extend the use range to enhance the value as goods by storing the time of sound recording or the like in a sound recording time memory circuit and not only producing a voice but also displaying the time and the date of sound recording on a display device at a reproducing time.

CONSTITUTION: When a sound recording switch S4 is turned on, a signal is inputted to a recorded sound reproducing control circuit 30 through a waveform shaping circuit 21. A time memory signal is outputted from the circuit 30 by this input signal, and an input circuit is formed in a recorded sound reproducing circuit 40 through an A/D circuit 45, and simultaneously, the time of sound recording is stored in a sound recording time memory circuit 50 by the time memory signal. In this state, a speaker/mike 3 is operated as a mike, and its output is stored in a sound memory circuit 41 through an amplifying circuit 44, switching circuits 42 and 43, the A/D circuit 45, and the circuit 30. In case of reproducing of sound information, an output circuit is formed in the circuit 40 through circuits 22, 40, 41, 42, 43, and 44 and a D/A circuit 46 when a reproducing switch S5 is turned on, and simultaneously, the time of sound recording is displayed on a display device 2 through a display switching circuit 60. At this time, sounds are produced from the mike 3.