Features: \n\n--Two-in-one fitness massage Not only can these smart circles burn body fat quickly, but they can also help you achieve your ideal figure. You can also massage your waist to relax you. One product, two functions: side exercise, side massage. Burn fat 2-3 times faster than the normal hula hoop.\n--Quiet bearings make your movement more comfortable Because of this pleasant experience, we recommend that you exercise for 30 minutes a day for 5 days. then you can burn up to 800 calories every time! Note: If the wheels on the pulley cannot turn smoothly,Just flush the pulley and clean it.\n--Free adjustment of 24 parts There are 24 parts with magnetic buckles that can be freely combined depending on the waist size. Suitable for the whole family, suitable for fat / thin waistlines!The correct way to remove the link is to twist the two links outwards, twist them in the opposite direction and they will pop out automatically.The assembly is also very simple, insert it along the o.