Popular fitness club "Renaissance" developed a very popular vibration machine that helps you improve your figure. 【Shape Twin Ball】 Use it for 3 minutes at a time! By squeezing it between your inner thighs and standing with your legs closed, your adductors are stimulated, and your pelvis is upright. Furthermore, by vibrating in that state, the muscles that maintain the balance around the pelvis (pelvic floor muscles) and the abdominal area (transverse abdominis), which are linked to the adductors, are also stimulated, leading to an ideal balance! There are 5 levels of vibration. Used only a few times. After a full charge, it will be wiped down with a disinfectant wipe before delivery. Operation has been confirmed. Please understand that this is a used item and has been stored at home.