A vibrating massage tool designed for self-myofascial release. Three-stage vibrations can be adjusted, depending on the massage area. Vibrations range from 2,200 to 4,700 rpm to give light, moderate, and intense pressure. Silicon material makes this more firm and durable than rubber. Dual rechargeable battery can run for over 3 hours per charge. Great to use with or without vibrations. Measures 7" x 3-1/2".