1. 2 in 1 Fitness and Massage: Ideal for sports, fitness, weight loss and entertainment. This smart hoop can quickly consume body fat and eliminate fatigue. You can not only exercise, but also massage your waist to achieve a relaxed state. 2. 360-Degree Massage Surround: Under the centrifugal movement of the 0.5lB soft gravity ball, the shock-absorbing massage contact is fully in contact with the muscles, and the inertial slide rail can massage all the muscles of the waist 360°, and the fat burning speed is 2-3 times faster than that of ordinary hoop . 30 minutes a day can strengthen the waist. 3. Detachable and Adjustable Size: The smart hoop consists of 24 detachable parts, which can be split and reassembled to adjust the waist circumference. You can choose your own hoop according to your waist circumference. Gravity balls can be filled. 4. Non-dropping Design: Using a flexible axis to ensure rolling at a constant speed and maintain smooth exercise.