[High-quality material] Composed of ABS material, wear-resistant and durable, 3 colors are suitable for boys and girls of all ages. [Simple gameplay] Simple play, relax, let it rotate up and down in the palm of your hand, simple and repetitive movements make you love it, and the bulge on the surface can massage the acupuncture points of your hand [Decompression effect] Through the continuous rotation of the palm, the internal shaft rotates to produce a soft sound to produce a massage effect, allowing you to stay focused during working hours, put aside worries, reduce stress or relax your body and mind. [Massage design] The protruding edges and corners on the surface of the massage ball are specially designed for massage. Exercise with fingers can reduce fatigue, promote blood flow, and reduce numbness in the hands. Can be used for hand/leg/shoulder/neck massage. Small size and light weight