Thank you for viewing! We perform operational checks and maintenance before listing, so you can use it with confidence! ◆Operation◆ ・Operation confirmed with batteries and DC power supply. No crackling or noise, and works well. ・Simple cleaning completed. ・Grease applied to the gear section, and silicone applied to the pedal shaft. ・Switches and rubber feet have been replaced. ◆Included Items◆ ・Main unit only Please ask if you have any other questions.