Smart Counting Chip + Ball BearingThe fitness skipping rope adopts smart counter design, which can display kilometers, miles, number of skipping ropes and calorie mode. Dual probe electronic chip makes counting more accurate. Built-in high quality ball bearings can ensure high speed rotation. Two models availablewired and wireless. Wireless jumping does not occupy space. No narrow and limited space limitation with wireless jumping cord, such as in office, bedroom, balcony. you can adjust the length of the rope according to your preferences. Jump rope length: 2.8m, cordless jump rope length: 24cm. Suitable for all agesLightweight and suitable for adults, children students and pupils, no age limitation. Improve children's growth and improve their intelligence. Lightweight and compactSmall compact design, personalized carrying in your gym bag, handbag or travel bag, allows you to do sports anytime and anywhere in motion. High quality and safety. Environmental protection ABS handles (non-toxic and odorless), thick and durable high-quality steel rope inside, the surface of the soft silicone protective layer effectively prevents the rope from hurting the thigh. For indoor and outdoor activities, home workout, gym, health promotion, cardio training, physical training, etc.