YAMAHA Silent Brass System SB7-9, a set including a mute for trumpet and a Personal Studio ST9. - Model: SB7-9 - System: Silent Brass System - Included: Pickup Mute PM7 - Included: Personal Studio ST9 - Brand: YAMAHA - Included: All items shown in the photos Thank you for viewing. As shown in the third photo, the battery cover is missing, but there are no issues with its use. Earphones will be included as a bonus, but if you are concerned, you can also use ones sold at Daiso or Seria.