Overview Silent sliding wheel shaft fast sliding no jamming. Eliminate belly fat and create attractive curves. Upgrade the dial to scientific fitness, accurately record multiple data. Gravity ball belt adjustable length, intelligent counting, massage contact can massage waist. Specification: Material: Silicone Product size: 330mm Suitable People: Men and women Product built-in: Display Color: Diamond style + pink, diamond style + blue Suitable for the crowd: Postpartum mothers/students/white-collar workers, unisex Applicable scenarios: Running sports, fitness equipment, health massage, fitness, and body, sports trends Package Content: 1 * hoop