Features: Multi-functional massage roller ball with hot and cold therapy versatility Specially formulated & reusable hot and cold components for longer-lasting therapy techniques Removable steel ball can be used alone or inside of housing TSA Compliant Gain the benefits of ice therapy, heat therapy, and deep tissue massage all in one versatile product Quickly and easily switch between heat therapy and ice therapy Removable steel ball allows for use in and out of housing Includes: One Ergonomic plastic housing unit One steel roller ball One cold therapy insert One hot therapy insert One travel bag One Quick Start Guide with step-by-step instructions on the most common injuries*