Product name: Fitness self-starting grip ball Packing size:8.0 × 7.70 × 7.20 cm (3.15" × 3.03" × 2.83") Product color: As shown in the figure Product material:plastic product features: Supports Wrist and Arm Recovery This exercise tool in relieving discomfort from conditions like wrist strain, elbow tenderness, and finger numbness. Regular use can help strengthen the hands, wrists, forearms, and upper arms. LED for Motivated Training Integrated LED lights activate as the device spins, creating visual that makes sessions more engaging. No batteries are requiredmovement powers the display. Simple to Start with Rotation-Based Operation An upgraded auto-start design allows immediate use with a turn of the wrist. No strings or extra steps are needed to begin . Comfortable Silicone Grip for Secure Handling A soft silicone provides a steady hold and reduces slipping during rotation. The device operates smoothly without strong vibration. Useful for Sports and Skill-Based Activities Helps build grip strength and coordination for activities such as climbing, tennis, golf, and music performance. Suitable for athletes and hobbyists alike. Precautions: 1.As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2.If you feel difficult to choose the size, you can feel free to contact mewe will give you some suggestion, but it is for you reference only. Shipment includes: 1*Fitness self-starting grip ball