Feature: 1. Automatic rebound design - The roller features an easy sliding automatic rebound technology that minimizes wheel swing and aids in movement control. 2. Whole body exercise - Enhanced two-wheel automatic rebound with a triangular structure ensures stability and safety, aligned with ergonomic principles. The double spring strong rebound design improves the strength and definition of abdominal, back, arms, chest, and shoulder muscles, while also helping to burn calories and build a fitter physique. 3. High quality - The automatic rebound abdominal wheel is crafted from stable, eco-friendly plastic and sponge materials that are anti-slip, sweat-absorbing, and comfortable. It also incorporates an automatic rebound function for added safety. The handle is easy to remove or install, making it more convenient for transport. 4. Automatic rebound abdominal roller - This roller assists in fat reduction and aids in body shaping. It effectively stretches and exercises abdominal, arm, chest, shoulder, and back muscles to achieve defined abdominal muscles. The exercise wheel enhances your core strength. 5. Convenient phone holder - This automatic rebound belly wheel includes an integrated phone holder. For beginners, this holder facilitates easier viewing of instructional videos, allowing you to watch and practice simultaneously. As you progress, you can use the holder to play motivating music. Material: PP+TPR Color: blue, red, orange, light blue Size: 37 * 25cm, Wheel-10cm Package size: 26 * 17.5 * 12CM Product list: fitness roller * 1, cushion * 1