Designed for Soundbrenner Spark. Helps your child feel the vibrating metronome where it works best – on the arm, chest, shoulder, or thigh. They’ll experience each pulse with greater strength and precision.

Designed for Soundbrenner Spark and children's bodies. Base strap fits 120mm - 240mm (5 in - 9 in). With extension, fits 350mm - 700mm (14 in - 28 in).