The Sunny Health and 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.