The FINIS Tempo Trainer Pro combines convenience and portability, using beeps to guide your stroke rate and maintain your rhythm during swimming sessions. Features Multi-Sport: Applicable for swimming, biking, running and more Audible Beep: Loud enough to hear in and out of the water Sync Button: Synchronize the device to a pace clock or stopwatch Adjustable: Tempo can be adjusted by 1/100 of a second Waterproof and floats in the water to avoid being lost External clip included to keep it in place on the swim cap 3 different modes: - Mode 1: Single beep in strokes per sec (0.02 seconds to 99.99 seconds). - Mode 2: Triple beep in strokes per sec (1 second to 9:59 minutes). - Mode 3: Single beep in strokes per minute. Sync button lets you synchronize the trainer to a pace clock or stopwatch. Removable clip to secure to clothing Small, convenient size makes it easy to place under swim cap Replaceable battery to extend the life of your trainer Auto shut off feature Details What's Included: Dryland Clip, CR1620 3V battery Country of Origin: Imported