The BLACKROLL FASCIA RELEAZER vibrates to improve flexibility and strength of the fascia and muscle tissue. The unit is made of high-quality walnut wood and has non-slip, soft-touch grips on both ends. Regular use of the BLACKROLL RELEAZER breaks down fasciae agglutinations and actively aids fitness, performance and personal well-being. This massager has two different vibration settings and four treatment surfaces. Its battery lasts up to 11 hours on one charge.