-Workout round lengths can be adjusted to 2 or 3 minutes, rounds from 1 to 12 and rest time between rounds from either 30 or 60 seconds.

-An audible bell sound and/or vibration feature alerts athletes to the start and end of each round.

-Can be worn securely around arm with elastic band provided, clipped to shorts or stand alone.

Requires 3 AAA batteries included.