Product size about : Diameter: 9cm/3.5'' Product color: As shown in the figure Product material:Silicone+ABS product features: Versatile Relaxation - This electric massage ball relieves tension from prolonged static postures by applying ergonomic pressure to the whole body. Designed for feet, legs, neck and various muscle groups. Precision Muscle: Specially designed relief pattern reduces skin friction while simulating manual kneading. Soft and firm touch for precise muscle care, and Sturdy silicone material for a wide range of uses. Best Skin Protection: Skin-friendly material and non-irritating texture ensure that every massage is skin-friendly, safe and odor-free. Easy to Use: This electric massage ball is compact and lightweight, with a built-in automatic timer. It prevents overuse and provides a soothing massage at home or on the go. Intuitive one-handed operation for ultimate comfort. Adjustable Massage Settings: Experience 5 intensity levels, precise relaxation, long-lasting care (180 minutes of continuous use), and equipped with a high-capacity battery that can be adjusted according to your exercise needs. 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 contact us at any time. We will give you some suggestions, but for your reference only. Shipment includes: 1 pc Vibrating yoga ball