The Sanyo TRC-540M Handheld Microcassette Recorder Includes Voice Activation Recording starts the recording of information as soon as someone speaks. The recording stops when there is an absence of sound;Three-digit tape counter facilitates the easy access to specific segments of the tape;Selectable microphone sensitivity allows optimal recording during personal dictation or when recording in a conference environment;2-speed playback and recording allows the user to select either the standard record/playback time or the half speed extended double record/playback mode;Auto stop mechanism turns off the tape drive system when the end of the tape is reached. This feature prevents the cassette tape from being stretched and extends battery life;Simplified one touch recording enables the unit to start recording at the push of just one button;Cue / Review control allows quick easy forward or back access to any part of the tape;Quick Record/Quick Review lets you check what you have just recorded and then resume recording without having to stop tape;Electronic pause control temporary stops the tape movement during recording or playback;LED battery indicator notifies the user when the battery needs to be replaced;External microphone jack allows the connection of an optional external microphone;External earphone/headset jack allows the user to monitor recordings through an optional headset or earphone.