Finis Circuit Trainer Audible Workout Timer for $24.99. Shipping is $5.00 for a total of $29.99 shipped. Here is a screenshot for your reference. This workout timer regulates your exercise and rest ratios from 1 second to 20 minutes, and features an LED digital display, adjustable horn blasts with amplified speakers, and water-resistant design. Most places have it for about $89 or more.