Built-in high quality 360 degree professional swivel ball bearing for smooth and easy rotation. 2. Electronic multifunction rope is equipped with timer, calorie counter and jump counter, accurate jump count with 4 buttons helps you lose weight and keep fit. The skipping rope automatically beeps when you reach your set workout goal. Suitable forchildren adults all family members. NOTE: They do not need to be turned off manually, but will automatically turn off after 5 minutes of inactivity. 3. Dual-mode skipping rope With creative design, you can switch the mode between skipping rope and cordless mode (using a short ball rope). In wireless mode, you can enjoy jumping as much as you want. Plus, this cordless mode allows kids to avoid trippingon the cord, and it's comfortable to use and doesn't take up too much space. More convenient and time-saving 4. Easy to adjust and easy to use Thanks to our adaptable mechanism, it is adjustable, so this 2.9 m long anti-twist skipping rope can be used by everyone - even very large or small athletes , adults and children. Rope skipping is never a mess, skippingrope is an easy and effective way to strengthen your body, lose weight and increase your stamina. 5. Stay healthy: Skipping rope is an effective way to burn calories, lose weight, lose weight and even flatten your belly. Jump rope works your lower body muscles and works your arms, shoulders, back and abs.