Powered by dry cell batteries. Playback, fast forward, rewind, and reverse tape functions work, but no sound comes from the headphone jack. For those who understand maintenance or parts acquisition, thank you in advance. Overall condition is poor. The battery case lid is missing. Sometimes the battery connection is bad. The exterior has a lot of damage. There are scratches and dirt. There may be other overlooked defects. For those who understand parts acquisition, thank you in advance.