I have confirmed the following functions: play, pause, rewind, fast forward, volume adjustment, and track change. I have only tested it with AA batteries. There are scratches and dirt. Please prepare batteries separately. Please consider this item as used, and understand that it is not new. - Brand: SONY - Model: MZ-E44 - Features: Digital MEGA BASS - Type: Portable MD Player - Color: Blue ~Included Items~ Main unit Remote control Battery case Earphones are not included.