YAMAHA Silent Brass System SB5J, allows for silent playing. Purchased a few months ago, but never had the opportunity to use it, so it has been stored on a shelf. I am selling it to someone who will appreciate it. I inserted batteries to check the operation, and the power turned on without any problems, and the lamp lights up. Please understand that this item has been stored by a private individual. Please purchase with the understanding that returns are not accepted. - Brand: YAMAHA