The Sunny Health & Fitness Digital Jump Rope is designed using resilient vinyl material for optimal speed. The anti-slip grip handles provide full motion control so you can focus on your workout. A convenient LCD screen keeps a precise record of your workout. The clock keeps accurate time the timer lets you set your workout time the count-mechanism keeps track of your jumps and the calorie counter keeps a precise record of your burned calories and fat percentage mode tracks the amount of fat reduced.