This is an air jump rope, a novelty item from HUAWEI smartwatches. I'm selling one because I have two. You can easily exercise indoors even when the weather is bad. It has a counter that measures the number of jumps. (Photo ③: The reference photo is of the older model I am using.) Furthermore, by linking with a HUAWEI smartwatch and app, you can visualize your exercise amount and keep a record of your workout history. (Photos ④, ⑤, ⑥, ⑦: The watch is not included in the price.) Thank you for looking.