Function: thin waist, buttocks, thin arms and legs. Strengthen multiple parts of the body to exercise, to strong body and to increase flexibility.There are particles on the bottom of the tray, will massage and stimulate meridian points on the bottom of the feet and help promote good health.In summer, many children will take The magnetic wave disc to play circles in the swimming pool, the atmosphere is full of entertainment, and many young people in the park take it to do aerobic exercise at-Home. Seniors use it in the yard for exercise!Home Fitness, Strength Training, Physical Therapy!Children use the twister board as a toy to play, the elderly use it as a body building, and young men and women use it as a bodybuilding tool. All people like it!During this special time, we need to exercise more to avoid getting sick.Perfect gift for adults & elders!We promise to replace it for free or return it for a refund within 30 days! If you have any other questions, feel free to contact us!Hope you have a good health and a good figure!