Smart digital counter shows weight, number of jumps, exercise time, calorie consumption. You can also use the timer to plan your training time. The counter is the perfect aid to train more scientifically and maintain high motivation. Ball Bearings and Ergonomic Handle High-quality built-in ball bearings ensure fast and stable rotation, ideal for double bottoms. Thanks to the ergonomic non-slip handle, a secure grip is guaranteed. ADJUSTABLE AND DURABLE The 3m long cable is easy to adjust to the desired length, so it fits all body types. If the protruding end bothers you when jumping, you can simply cut it off or use the provided cable ties to secure it. The steel cables are protected by a PVC jacket and are suitable for use on outdoor hard floors. Car Kit Auxiliary Receiver can connect 2 bluetooth devices at the same time to enjoy your music, wont miss any calls. Enjoy the freedom of music, GPS or taking calls.