Voice recorder offers double recording time for recording at normal speed or half the normal speed for extended sessions on standard cassettes. Voice-operated recording activates the recorder when audible sound is present. Additional useful features include playback speed control, 25 hour battery life, LED battery indicator, a built-in microphone, Clear Voice Recording System, automatic shutoff at the end of your tape, one-touch recording, and Sony-Matic Automatic recording level control. The large playback speaker enables improved sound while the cue and review function simplifies your search for specific points in your recorded material. Stop/Pause Release Function automatically turns off the pause switch whenever the stop button is pressed, to prevent loss of recording. Uses two AA batteries (sold separately).