PERFECT MASSAGER FOR FULL-BODY EXERCISE: To warm up before sports such as climbing, football, tennis, basketball, golf, relax the body, strengthen muscle strength such as hands, shoulders, back, legs and feet; it can also be used to relieve muscle soreness after exercise. Meet your daily exercise needs.

SCIENTIFICALLY ENGINEERED: Scientific Design & Attractive Color, Fits naturally into the Palm for ease of use

Instruction -- Massage your muscles gently with the tool. Just lay it flat on the muscles, without high angle, make the whole close to skin when you roll it.