YAMAHA Silent Brass PM Silent Brass Model number unknown. Some dirt and scratches are present. Please check the size and condition in the photos. This is only the mute microphone part. The personal studio part is not included. Since the operation has not been confirmed, it will be treated as junk. Instruction manual and box are not included. This item was given to me, and the purchase date is unknown. As it is stored by a private individual, there may be some scratches on the container. Please refrain from purchasing if you are sensitive or concerned about details. Please consider and purchase with the understanding that it is stored at home. If you have any questions, please feel free to contact us.