Jump Rope with Smart Counter : Designed with digital jump rope counter which is helpful in monitoring your exercise progress. The HD LED screen which displays on this speed jump rope shows Calorie, Jumps and Timer. Simply set your weight and workout, it will show you the number of circles jumped and calories burned. It can be switched at any time as needed with cordless mode and rope jumping. In cordless mode, use 2 cordless balls to mimic the feeling of jumping with a real rope and without the fear of tripping over the rope or hitting your legs. Ideal for daily exercise in a narrow space or outdoors where it is not smooth. QTY over 1000 are shipped by sea.