DESC: Clear Voice Plus gives you greater clarity during recording and playback. Built-in mic and speaker makes for easy recording and playback.Two-speed record and playback: You have the option of recording on a standard microcassette at either normal speed of 2.4cm/sec or half the normal speed at 1.2cm/sec, letting you to get up to three hours of audio on a 90-minute microcassette.Voice operated recording: Voice activation allows you to conserve tape and eliminate soundless passages.