Regardless of whether you are using the N20 or N40 series, the physical button reset procedure is the same.

1. Find a soft cloth to put on a table before you put the Muro Box upside down. This soft cloth should protect the lid of the Muro Box from being scratched by accident.
   
   
   
2. Find something tiny and hard like a needle so that you can insert it to the reset hole for resetting the Muro Box to its factory check mode.
   【Regarding the location of the reset hole: Please turn the music box over. You will see a small, circular hole (approximately 2 mm in diameter) in the center of the base. This is where the reset button is located. 】
   
   
   
3. Push the reset spot with the needle in the unpowered Muro Box. Hold this needle in the reset hole and then connect the power cord of the Muro Box and continue holding this needle for 5 seconds.
   
   
   
4. Remove the needle from the reset hole. Wait for the short default melody playing by the Muro Box to tell you the rest step is completed.