Through Authenticate 
Features & Functions:
*Jump with your body to add your body
rhythm
*It is very elasticity to do exercise,
quick reach efficienty of the aerobic exercises.
*Jump with your body to add your body
rhythm
*It is very elasticity to do exercise,
quick reach efficienty of the aerobic exercises.
*Help to train your balance
*More interesting to use it to do exercise
*Loading weight:200Kgs
remark: if need DVD,plus
