Material: Selected high-quality materials (ABS) Product volume: 35*35.5*7CM Adjustment: adjustable strap Suitable waist: 60-140cm Weight: 1.15kg Applicable people: unisex, suitable for all ages Main functions: fitness equipment, health massage, fitness and body. Entrance: 1cm=10mm=0.39inch. The size is measured manually. Due to different measurement tools and measurement methods, there will be an error of 0.5-1mm. If you have any questions, please contact us for customer support. Easy to store and carry, improve posture, reduce weight and have more fun. This product has the functions of massaging the waist and abdomen, slimming, cleansing the intestines and aiding digestion, combined with aerobic exercise can quickly strain the abdomen. Help understand your fitness progress! It has a built-in smart counter that can calculate and store workout data (displayed on the LCD screen). The traditional hula hoop is too big to carry, and the smart hula hoop is small and compact, so you can take it out easily. If you have any questions, please feel free to contact us. Product description Widely used: suitable for various health purposes, such as fitness exercise, sports and treatment! Use this option to automatically rotate the hula hoop, making you slim! Easy to use: This product is easy to use, not easy to fall off, light weight, does not take up space, suitable for people who do not want to use a traditional hula hoop and lose weight.