Interval Workout Timer with Loud Bell is available in 110 V and 220 V AC range. The Timer comes with rest button with 2, 3 and 4 minutes round while rest period can be set for 15, 30, 45 or 60 seconds and interval length can be set for 15,30,45 or 60 seconds or no interval. The Interval Workout Timer with Loud Bell is capable of providing efficient performance.