Thank you for viewing! We perform operation 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 performed. ・Grease applied to the gear section, and silicone applied to the pedal shaft. ◆Included Items◆ ・Main unit only Please ask if you have any other questions.