About this item [Accurate Calorie Tracking] Stop guessing your calorie burn. Unlike standard counters that use fixed averages, this smart rope features a processor that allows weight input from 100 to 400 lbs (45-181 kg). It converts every jump into scientifically accurate energy expenditure data, ideal for serious weight loss and athletes of all sizes. [Adjustable & Easy to Use] The 9ft cable can be adjusted to your desired length, suitable for men, women, and kids. No cutting required. [0.001s Precision] Experience zero-lag tracking with upgraded Dual-Hall magnetic sensors. The rope samples rotation data every 0.001 seconds, ensuring no skip is missed, even during fast double-unders or HIIT. Say goodbye to ghost counts common in budget ropes. [Ergonomic & Anti-Slip Grip] Designed for endurance and comfort. The ergonomic handle fits perfectly in your hands, preventing palm sweat and providing a firm grip. Lightweight construction reduces wrist fatigue, allowing longer and faster jumps. [Smart Coach & Long Battery] Train smarter with audible goal alerts. Set your target jump count or duration, and a clear beep signals completion—no need to check a screen. Powered by a user-replaceable CR2032 battery with auto-sleep, delivering up to 6 months of daily use. [Versatile for All Workouts] Perfect for fitness, weight loss, boxing, MMA, and more. The tangle-free ball bearings ensure smooth rotation, making it a reliable tool for any training routine.