The rattling 'boing' you hear on Latin, jazz and pop records, in Mano Percussion's version. A wooden ball sits on a bent metal rod that runs into a wedge-shaped wooden sound box; strike the ball against your palm or knee and the box buzzes for a second or two. Natural wood finish with a plain metal handle, nothing to tune or adjust. Handy for classroom sound effects and for percussionists or cajon players who want one within reach. Model ED439.