This version of the Bullet Buddy has been designed with hands-free use specifically in mind and is more comfortable to use with a neck than before. It omits the sound chamber of the original Bullet Buddy's design so that the mic's element is brought as close as possible to the harmonica for maximum 'compression' of the sound, giving it a deep and rich bassy tone. It can still be used hand-held if you wish and is a great solution fo those who find it difficult to cup the mic and harmionica together effectively. for a hands-free solution use it with the the appropriate Ammo Clip* on a mic stand. or one of the suported neck racks**. The bullet buddy is designed to be used with a wide variety of harmonica (bullet) and vocal microphones, but for simplicity, only the most popular (520) are listed here. Please feel free to reach out and contact us if you do not see a variation for your favorite mic listed. * When attached to the mic the whole Bullet Buddy unit fits into an Ammo Clip Bullet Mic holder on a mic stand. **The Bullet Buddy has been designed to fit the Konig & Meyer 14615 neck rack specifically, but also works well with a Hohner FlexRack. Other types of neck rack may also work but have not been tested by us and are not guaranteed to be suitable. This listing does not include any Ammo Clip mic holders or harmonica neck racks. Those are sold seperately.