This is a Sony stereo microphone for voice recording. It is a discontinued product and quite old, so there is some dirt and wear. It can record without any problems. Please make sure it is for connecting to a Walkman. Compatible models are memory-type Walkmans. Two-level recording level switch (dictation/conference mode) AGC function automatically adjusts the volume of voices for uniform recording Four-level bit rate settings (ATRAC: 256/128/64kbps, PCM: 1411kbps) Shipping will be via Yu-Packet.