DONNER FINIS Tempo Trainer Pro
Find the ideal pace with a FINIS Tempo Trainer Pro. Made to fit on goggles or under a swim cap, the audible beep will help swimmers find and maintain the perfect stroke tempo. Now with a replaceable battery to make sure it lasts use after use.
Features: Loud Enough to Hear in or Out Of The Water, Easily Secures Under Cap or Goggles, Adjustable Tempo, Auto Shutoff