I bought this new six months ago and used it a few times at home, then put it back in the box, so it's in very good condition. It offers a light and easy playing experience and intonation that's completely different from conventional practice mutes, making it easy to see why it's described as a "small soundproof room." Includes the original box and instruction manual. It works not only with Bb trumpets but also with C and Eb trumpets, as well as long piccolo trumpets that don't interfere with the bell.