I was able to record, play, fast forward, and rewind using my own cassette tapes. Batteries are not included. Main Features and Specifications 3x Recording Mode: Allows you to record three times the normal length of audio on a single tape. Slide Microphone: A movable microphone is mounted on the left side of the unit. Long-Life Design: Allows for long periods of continuous recording with AA batteries. Pause Lever: Easily pause (PAUSE) recording using the round dial on the front. It's about as light as a smartphone (approximately 170g to 200g), making it easy to carry around in your pocket or bag.