This item makes a rattling sound when the main unit is shaken. While it doesn't affect the operation, please refrain from purchasing if you are concerned. YAMAZEN Radio Voice Recorder YVR-R600 Operation confirmed using 4 AAA batteries. Playback, recording, and radio reception functions all work without issue. Volume adjustment works without issue. There are minor scratches as it is a used item. Main unit only. Multiple item purchases are welcome! Purchases without comments are welcome! A small discount will be offered for combined purchases. Thank you.