High quality material: The Ab roller is made of durable ABS material, whose sturdy properties enable the ABS material to withstand the stress and pressure generated during training and maintain stability for a long time. Upgraded version of abdominal muscle board: This abdominal muscle board surpasses traditional abdominal muscle boards and has multifunctionality to meet the needs of various sports. It is not limited to standard abdominal exercises, using the included resistance band can also fully exercise core strength, gluteus maximus, back muscles, and balance ability. Automatic rebound: This AB roller adopts advanced automatic rebound technology, making your movements smoother and more effective. It provides strong rebound force, making it easy to exercise core muscles without additional pressure. Suitable for fitness beginners or experienced athletes. Anti slip bottom: The web anti slip bottom design ensures stability, prevents slipping, ensures safety during exercise, ensures stability during training, reduces the possibility of slipping, ensures safety, and improves stability and stability. Built in timer: The Ab exercise board is equipped with a real-time timing sensor timer, which has precise timing and countdown functions, intelligent control of exercise time and amount, timing screen, reset button, and timing button.