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Produce well conditioned athletes as Cuba and Russia have through interval training. Round length adjustment - rounds can be set for 2, 3, or 4 minutes. Rest period length adjustment - rest period can be set for 15, 30, 45, or 60 seconds. Interval length adjustment - interval length can be set for 15, 30, 45, or 60 seconds or no interval.
One tone indicates the beginning or end of round, another tone indicates the interval. Comes with 1 year limited warranty.
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