Sony ICD-B7 Digital Voice Recorder 150 Minutes Of Recording Time (2.5 Hours) is available on the integrated circuit chip which may be recorded over and used again Slim Style Design only one-half inch thick, with Record and Pause controls located on the side of the unit for easy operation; fits neatly into a shirt pocket and includes a convenient pocket clip to help avoid misplacing the recorder Built-In Microphone for extra convenience, eliminates the need for an external microphone Built-In Playback Speaker for monitoring playback of recordings Record-Pause Function temporarily stops recording to allow for pauses in dictation or to provide time for reference to documents, then resumes where recording was stopped, at the press of a button