With this jump rope to use, you can know how many calorie you burnt when jumping, how long you have jumped.A multi-fucntion rope Features: Count, timer, count alarm, timer alarm, clock, calorie, fat How do you know whether your exercise is healthy or not? Choose a correct rope to record the data of your body will be very helpful for you.Considerate of Jump Rope JPR-2103 in KYTO please. It was ...