Perfect for swimming, running workouts, and cycling routines, providing stable rhythm in scenarios such as pools, tracks, or outdoor trail Enjoy versatile frequency modes and a long lasting rechargeable battery with up to 20 hours of use, making this waterproof sport gear essential for flexible and uninterrupted training Achieve precise rhythm control with our high accuracy swimming metronome, featuring a timing chip that ensures less than 0.1 seconds error per minutes for consistent frequency training in sports like swimming, running, and cycling Ideal for professional athletes, fitness enthusiasts, and swimming seeking dependable tools to enhances training efficiency and achieve good Constructed from IPX8 waterproof and weighing only 20g, this lightweight frequency trainer easy portability and reliabled in any environment, Manufacturer: Tsophreniq