YAMAHA Yamaha Silent Brass System SB3-9 For French Horn This is a set (SB3-9) consisting of a pickup mute (PM3) and a personal studio (ST9). (Manufacturer's suggested retail price at the time of purchase: 20,790 yen) I acquired this, but I'm selling it because I rarely use it. It works without any particular problems. There are some scratches on the box, but the personal studio (the part that looks like a controller) and the mute were used with great care to avoid bumping them against the instrument, so they are in relatively good condition. The sponge part of the mute does not appear to have deteriorated significantly. Please note that the original earphones have deteriorated and fallen apart, so I used my own. Therefore, the earphones are not included. Also, the original strap is not included either. Please purchase only if you understand that this is a used item. Also, please be aware that the protruding parts of the outer box may be folded for packing and shipping.