Interval Workout Timer TMR05-G Grey LOUD with VOLUME control: Boxing, Wrestling, Martial Arts, MMA, HIIT, Endurance, Strength, Fitness Interval Workout Timer Wrestling, Boxing, Martial Arts, Fitness, MMA, HIIT, Endurance, Strength Interval set up: work time - T1, rest time - T2, number of intervals - # (59 intervals max) Model TMR05-G is LOUD with VOLUME control, has ON/OFF switch and easy key layout Fitness club friendly - mounts on any equipment frame