Suit for RENPHO smart jump rope - The cordless jump rope replacement is for RENPHO smart jump rope counter ( Search R-Q001/R-Q001-OR). You can get 2 modes: cordless mode, and rope mode with it if you bought our smart jump rope. Widely used & tangle-free - You can connect the ropeless balls with the handle to achieve cordless jumping. It imitates the feel of skipping with a real rope without actually needing to swing one rope around, no more tangling in cordless mode, and never tripping yourself up. It can be widely used in living rooms, offices, bedrooms, and outdoor. Adjustable rope & solid TPR cordless ball - The cordless jump rope adopts a diameter of 4.5mm, length 11.42in/29cm PVC rope that is durable and can be adjustable. The solid ropeless ball is made from TPR material, weighing 0.05lb/22g. Suitable for all ages and all level jumpers. Most convenient cardio exercise - With RENPHO smart jump rope, you can get a more efficient, more low-cost, and happier cardio exercise. The jump rope is lightweight and portable, it can be flexibly used indoors or outdoors. Keep workouts, it will help you keep a fit body and effectively improve cardiopulmonary functions and endurance. The total package includes 2 pairs of cordless jump rope accessory, 2 sets of spring clasp and cap, and a quick guide.