Swimming Metronome Pace Device: The FINIS Tempo Trainer Pro fits snugly beneath your swim cap and transmits an audible tempo beep while you swim Swim Pacer with Adjustable Tempo: Use the Tempo Trainer Pro to modify your tempo by 1/100th of a second; perfect your swim pace and find your groove in the water Stroke Timer with Multiple Modes: This waterproof swim accessory features three distinct modes for stroke rate, lap pace, and strokes per minute Versatile Use Pacer for Swim & More: Metronome includes a clip for dry land exercise and is suitable for various sports, including swimming, running, and biking