Product size about : 8.3*7*2.3cm/3.2*2.7*0.9'' Product color: As shown in the figure Product material:Silicone product features: 1.This smart silicone grip strengthener features Bluetooth connectivity, allowing you to control your phone hands-freeflip through videos, pages in e-books, or even like posts with a simple squeeze, making workouts fun and interactive. 2.It offers multiple training modes like single-finger, double-finger, and thumb exercises, perfect for targeted hand strength building and adding variety to your routine. 3.Designed for stress relief and fitness, it helps you relax while strengthening your hand muscles, with a soft silicone material that's comfortable and skin-friendly. 4.Compact and portable, it easily fits in your pocket for on-the-go use, and its sturdy silicone construction ensures it lasts through daily workouts without losing shape. 5.With a long-lasting 40mah, battery that supports rechargeable use and clear digital display for accurate rep counting, its hassle-free and keeps you motivated without worrying about power. 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 Silicone Grip Strengthener