Compared with the traditional hula circle hoop, the upgraded smart hula circle hoop is easier to use and will never fall, even the beginners can use it. When using this hula circle, body will be burned quickly, physical fatigue will also disappear soon. They can also massage your waist to help you relax. One product, two functions: side movement, side massage.Attentions:1. please warm up before you use is. be sure all the piece lock into place.2.Don\'t spinning it too fast. maintain a stable and uniform movement, make the body feel relaxed and breathing keep even.3.Please exercise in a spacious field. Ensure that all joints firm to prevent the ball from falling off and hurting people or objects around them, especially children.Product information:Package Dimensions ‏ : ‎ 17.68 x 13.11 x 3.62 inches; 4.5 PoundsProduct name: Never Falling Weighted HoopProduct material: ABS, PVC, Nylon ropeProduct size: AdjustableFor use by: postpartum mothers/students/white collar workersPlease allow for small measurement errors caused by manual measurement. Please take the measurements of the product as standard.